Hifi tuning fuses

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HiFi Tuning SUPREME Audiophile Fuses

The HiFi Tuning Supreme Fuses utilize a 99% pure silver and 1% pure gold alloy, tip-to-tip... from caps to burn wire. They also employ a specially developed ceramic casing, with an additional anti-resonance tube, as well as quantum and cryogenic treatments.

HiFi Tuning is based out of Germany, and the HiFi Tuning fuses have won many awards and received great reviews from the audiophile community aaround the world.

Amongst all the great fuse choices available from many brands the HiFi Tuning Supreme fuses I consider to be a universally solid pick for any audiophile that is looking for a musical presentation, without risk of suffering from listening fatigue over longer listening sessions. The HiFi Tuning Supremes strike a nice balance between not being too bright, nor overly syrupy.

For best performance, the HiFi Supreme fuses should be installed one way, listened to, and then reversed the other way to determine best sonic orientation.

Please check your cart very carfully before checking out, to ensure you are ordering the correct fuse. We cannot accept returns on blown fuses, unless defective.

Sours: https://www.vhaudio.com/hifi-tuning.html

Hi Fi Tuning Supreme fuse-Burn In?

Two comments. Probably more time is required with full signal to break in. HiFi Tuning fuses like all fuses are Directional so be sure to try both ways. 

Many thanks for the response geoffkait.
Yes, I've tried installing both ways and I'm confident I've got them in the right direction.
Thanks again!

It's unfortunate that Hifituning discontinued the Silver Star fuses.  It was the real champ in their line.  From speaking with others who have experience with the Supremes, they will leave you wanting compared to the discontinued silvers.  I was fortunate to scarf up some Silver Stars from Parts Connexion when they had a close-out sale on them.

Good Evening hifiman,

I tried the Silver's in my system and they were just a bit too bright for my taste-even more so than the Supremes.
In my system, the Supremes sound better.
Thanks for your input.

Yes, the Silverstar are made from pure silver. They are very fast and bright fuses. So, if you feel they sound nice, they are definitely well broken in.

The Supreme fuses are much better, in my opinion. They are much smoother and don’t have that super bright "silver" edge. They will still have a very fast sound and may start to push the upper mids/highs too much in some systems. 60 hours is not a whole lot of time. I would say run it in for 100 or even 200+ hours before making a final decision.

The old Hi-Fi Tuning Gold were not that great of a fuse. They were warm sounding and at the same time had somewhat of a fast attack. The problem was they sounded somewhat metallic and had a really bad "glare" to them.

There is a new Hi-Fi Tuning "Supreme Cu". They use pure copper wire and end-caps, with the end-caps being gold plated. I suspect they will be a much warmer sounding fuse like the Isoclean, but better.

nonoise's avatar

Thanks for the input you've been putting in recently on the various threads concerning fuses. You do try a lot of them. 👍

With my Kinki EX-M1, I'm getting performance way beyond what my Marantz has and it has the Brimar fuse, which I found to be very neutral and extended. I've yet to check and see what type fuse came with the Kinki.

I think going even further in clarity and extension would be for naught and that a hint more body and weight would be worth a try.

Once my new ICs break in, I think I'll give that Supreme Cu fuse a try.

All the best,

lalitk's avatar


I have got variety of HiFi Tuning Fuses in my rig. I end up preferring the Supreme Cu fuses on my digital components over any other fuse I’ve tried. They lean towards organic and warmer sound. 

Unfortunately, the Supreme Cu are only made in smaller size.   

I agree with your assessment on Supreme Au/Ag. I am currently using one of them in my preamp, they have been my favorite so far. Interesting feedback on Hi-Fi Tuning Gold fuse, I will be trying one soon on my amp. 

nonoise's avatar

Nothing like seconding a recommendation.
Thanks, @lalitk .

All the best,

Heh, interesting feedback.  I actually have found that the normal Hi-Fi Tuning "Supreme" fuse works the best in digital transports or anything that does a "digital only" circuit.  Silverstar is just way too fast/bright (same with Synergistic SR20).  Other fuses, such as Furutech/Isoclean, are just way too slow/warm for digital transports.  I use a dedicated linear power supply for my Lumagen Radiance video processor and the video was the cleanest with Supreme fuse.  Any other fuse would show grainy/dirty video.

As I have said before, my "go to" fuse is Furutech rhodium, but I will use Hi-Fi Tuning Supreme in some instances where a sound or circuit is too slow/warm.  I have found other instances where I need to use a very warm Isoclean or "Supreme Cu" (example would be a Bryston Amp).

I have not tried BLUE or BLACK or Audiomagic fuses.  BLUE is on my list for something to do when I run out of everything else.

Fuses are a tool to help tune a system.  There is no "best fuse".  Just like there is no "best amp", etc. etc.

Thanks everyone for your feedback-much appreciated!
auxinput, thanks for the advice on burn-in.
I'll let them run to the 200 hr. mark and see what happens.
Just a final observation....I am amazed how a fuse can affect the sound the way it does.
Both the Gold and Supreme sound a world better than the stock fuse in my Manley Stingray.
In other words, they greatly improved my enjoyment of listening to my system.
I know there's been a 1001 threads regarding fuses.
Don't know how they work or why they affect the sound the way they do.
But in my system it's absolutely a step forward to the promised land.
Thanks again everyone.
Hope your weekend's going well!

@greh - disclaiemr: there’s huge controversy in this industry on whether or not fuses make a difference, but since you can actually hear the difference, this doesn’t matter.

The fuse is just one more voltage transfer element in the audio chain, just like power cords and interconnects and speaker wire. Actually, the fuse should be looked at as an element of the power cord, since it usually transfers A/C current, or even possibly DC current in some situations, to feed the audio circuits with power. Just like different power cord metals/plating can influence the sound, the fuses also contribute.

Generally speaking, silver is the best electrical conductor and will transfer current lightening fast. However, in a lot of cases, this can cause negative effects that will present as pushed upper mids/highs, too bright / harsh sound, etc. Gold-plating is a very warm influence and rhodium is the most neutral (in my opinion).

The other impact is reducing the electrical resonance. The fuse is just a tiny wire, but it’s a strung tiny wire in air, usually surrounded by a glass tube. The glass tube will resonant from mechanical vibrations, which causes that thin wire to resonate like a guitar string. This introduces noise into the voltage and can cause instability of current, which reduces resolution and actually reduces bass and body in the sound.  It can also create bright/harsh sound.

The wire will actually have electrical resonance as it charges/discharges the current.

Upgraded fuses will work on reducing that electrical and mechanical resonance by doing multiple things. Using ceramic casing instead of glass. Sometimes winding the internal wire around a non-conductive center-pole. Putting non-resonant filler inside the fuse. Putting anti-resonant coating on the internal melt wire.

Finally, they use much better metals for the internal melt wire and end caps. Pure copper. Pure silver. Mundorf silver/gold mix (Hi-Fi Tuning Supreme). Rhodium, etc.

"I have not tried BLUE..."

auxinput, why not change that now. SR Blue fuses on sale right now, buy 2 get one free with 30 day return privilege. 

I have had many brands of fuses and found the Blue to sonically outperform them all in the most components. 

Like lalitk, I preferred the HiFi Tuning Cardas Cu (copper) fuse over the SR Black in my Aurender but the Blue is another matter. 


A very nice description of just some of the changes that can be made to improve the sound a fuse imparts on a piece of equipment. 

The main point to me is that all the power goes thru the fuse and different fuses can have a significant affect on a system's sound.

dlcockrum definitely brings up a good point mentioning the Synergistic Research Blue fuses. I also agree they have a very positive affect and with their being on sale and having a great return policy, this is a good time to give them a try. They have been a major upgrade in my systems.

David Pritchard

Like I said, since I haven't tried the BLUE fuses, I don't know what they are going do to the sound.  The only thing people have said is "they sound amazing", but they don't quantify what is being changed.  Since I know how the Furutech and Hi-Fi Tuning Supreme affects system and voltage, I will continue to use those fuses to tune my systems.  I still have several other issues and equipment I need to upgrade and take care of first before I start another journey on "what exactly is this BLUE fuse doing?" .lol.  I have not read the thousand plus posts "Blue" thread.

Why a premium fuse sounds substantially better then the stock steel- zinc fuses 
is easy to explain , just lookup metal  conductor  resistances 
the higher number the better, Copper,Silver veryclose 63-67 index
the stock  buzz fuse a 18 maybe . It is a high bottleneck like a 1/4 pipe vs a         1 inch pipe  all that low level hash is resistance the electrons can just move far more freely.
i give them a minimum of 100 hours to settle down ,and more refined up to
 Another 100 hours.

Oopsy Daisy, I’m pretty sure you didn’t mean electrons. We’ve had that chapter already. Electrons don’t really move. Besides you’ve got your vibration control and RFI/EMI stuff and you’ve even got some quantum stuff to consider in the case of HiFi Tuning Fuses.

nonoise's avatar

@greh ,
I started out with Silver Stars with my Marantz and found the same thing as you: bright leading edge and a lack of body or weight in exchange. 

If you're tinkering with an amp, may I suggest the PADIS fuse? After trying a AHP fuse in my Kinki integrated, it had the same, if not more pronounced, effect as the HiFi Tuning fuse. Incredible intelligibility and air at the expense of body, weight, low end, etc. 

Discovering that the Kinki uses a 8A fuse, I looked at my old collection and put in a PADIS fuse (that I found a bit too dark in my Marantz) and lo and behold, it's a winning combination. 

The Kinki still has all the extension, air, detail and attack but now has more weight, body or gravitas, if you will. It's a more muscular presentation but not at the expense of anything else. Anything instrumental sounds all the more realistic and vocals have a more corporal element to them. 

Maybe I should have waited a little longer for it to break in or it could be it's more copasetic with the Kinki, but it's staying in for the foreseeable future. They're only $25 and it takes about 2 weeks to get them from Germany and they're fully compliant with any and all electrical ratings.

All the best,

Geoffy The Fuse Troll:

Electrons don’t really move.
Hel-loo Geoffy The Fuse Troll! rpt Hel-loo Geoffy The Fuse Troll! Everyone except you knows that the motion of electrons is the definition of electicity. Wake up and smell the ☕️ Geoffy! Get on the reality train while you’re at it. Toot! Toot! 🚂 🚂 🚂 

Post removed 

What I stated is fact if you don’t understand that is not my fault 
try reading . The wire in a fuse is calibrated for its average they have various thicknesses . That is how they blow .a fuse wire 
will break when over heated past it’s ability, 
land my. Answer to resistance steel vs copperor silver  if you can read the metals resistance index clearly shows that a steelfuse has many times-more resistance then copper or silver.. thatis solelythe main reason the silver or copper fuse sound better. I owned a Audio store in the U.K for 10 years ,and Hifi tuning reps I spoke with in depth.
this is what bugs me some novice will tell me I am wrong ,and have no clue ,just their assumption . I have over 35 years in audio 
know a ton aboutmodding and treating  systems.
dont berate someone  because of your ignorance. My uncle is a 40 year mastertechnician and he was in agreement with the Higifi
tuning rep. If you have a different theory then state your case.
if not keep your opinions to your self.

This is to. kosst_amojan   Not even 1 purchase, or  sale
and on Audiogon for less then 1 year , and is telling a Veteran as myself 
over 35 year, owning a Audio store  for years, and worked with some of the most 
skilled Audio  engineers in the field .  To come out and belittle someone 
that you yourself have little to No experience or logic is just 
an ignorant statement . My answer on high end fuses  without question 
was Correct .  Look at the top fuses Silver  conductor, or Copper , vs steel 
They are far better conductors and 5x less resistance . And the conductor element blows - Wire melts when exceeding rated amperage which creates 
the short circuit disconnecting power to the circuit . There is the correct answer!!

It appears, just going by what customers have reported, while HiFi Tuning fuses are extremely well made and contain very pure metals and pure solder, even quantum treatments, they are not (rpt not) always at the top of the food chain in terms of sound quality. Bouquet fuse makers all seem to have tricks up their sleeves. Some even build their fuses on a stock fuse, or so it would appear, which flies in the face of the pure metals argument. And bouquet fuses vary how they handle RFI/EMI and vibration. Furthermore, it appears “quality of current” plays some role, too, what with the directionality characteristic that all fuses exhibit.

Audioman58 even if you believe in magical 🧙‍♂️ fuse bs your first post makes no sense. 
You state “just lookup metal  conductor  resistances
the higher number the better, ”
 What you are referring to is conductivity, not resistance.  With resistance it is the opposite, the lower the number the better. 
 In addition if you understand power supplies there are many other problems with your analogy, which he was alluding to but I won’t get into. 

@geoffkait what is a bouquet fuse, is it made from flowers picked from far away lands with clouds of cotton candy and streams running with single malt whiskey?

bdp24's avatar

If you install a Hi-Fi Tuning Fuse in a DC circuit of your tube power amplifier, you may end up "burning in" your entire amp ;-) .

@bdp24 - It SHOULD be easy to provide examples, of that ever happening.

analogluvr727 posts12-01-2018 8:[email protected] what is a bouquet fuse, is it made from flowers picked from far away lands with clouds of cotton candy and streams running with single malt whiskey?

>>>>You can dream of Blue Bonnets, Angel Hair and Sweet William If it helps you. Why would I care?

Actually, resistance and conductivity are really addressing the same thing, you know, one being the inverse of the other. Come on, trolls, get with the program! 

bdp24's avatar

@rodman99999 , Roger Modjeski received one of his Music Reference RM-9 amplifiers back for repair. Every stock fuse in the amp had been replaced by the amp’s owner with a Hi-Fi Tuning Fuse. Roger checked out the amp, discovered what had happened, then did some research into the fuses. He wrote up his findings on his AudioCircle Music Reference Forum (that info is still viewable on the Forum), but basically it was that the HFTF is not properly designed or constructed so as to be able to provide protection to an amp employing fuses on it’s output tubes, and is in fact incapable of doing so. A phone call to the American distributor, and then the design engineer in whatever country the fuses are made (Germany, I believe), revealed to Roger that neither are very well versed in basic fuse technology and engineering in terms of their use in tube hi-fi amplifiers. Well worth searching the AudioCircle MR Forum for Roger’s full report, for those interested.

WOW(one in a row)! Anyone that’s frequented this forum(and it’s fuse threads), is familiar with that story. If HI-FI Tuning’s fuses were responsible/culpable, where are the plethora of similar incidents, that would(necessarily) have followed? The Internet, and it’s various, "audiophile" sites, should be replete with them(especially, with all you Fuse Police looking to find fault). I’m just SUPPOSED to believe, that the one individual that blew up his amp, was using correctly rated fuses? Perhaps I’ve just met too many dishonest people, in my lifetime.

btw: I’ve had HI-FI Tuning’s fuses(Gold and now Supremes) in my Cary monoblocks’ mains and B+ circuits, for over 12 years, without a problem. That’s not counting when the occasional tube took a crap and the fuse did it’s job. Then again, that’s just my own(one person’s) experience, and- why should you take my word?.

bdp24's avatar

@rodman99999, I see no problem with one having your experience with and opinion of the Hi-Fi Tuning Fuses AND reading what Roger has to say about them (not just on AudioCircle, but also in some thread here on Audiogon). But that’s just me ;-) . Unlike some of the other high end fuses, many of the HFTF are cheap enough to give a try without spending a fortune (relative to the cost of the amp itself).

Let’s look at the numbers, shall we? What are they, 10,000 or 20,000 to 1? Not very good odds for ye olde skeptic, yes? We get this sort of thing frequently. It disobeys the laws of science and electricity. All fuses are the same. It’s a fraud and a hoax. The usual.

@bdp24 - I try to apprise myself of as much information as available, whatever I’m considering. So- no problems at all, with reading as many OPINIONS as possible. One should remember, that these are all OPINIONS, however. I try to base my decisions on my own experimentation/experience, before drawing a conclusion(the scientific method). Too many try to proffer categorical statements, though, that they can’t establish/corroborate. To me, that’s not helpful, but- simply muddying the waters, for those seeking knowledge. Again- just my opinion.

Just to let everyone know, HI FI Tuning fuses cannot be used as tube fuses or in any DC application. They have very low breaking capacity and will and have damaged eqiupment. 

Their claims would make no sense and are an instult to a logical person. They put the wire in a teflon tube to reduce microphonics. If you can believe that then go right ahead.

@rodman99999  btw: I’ve had HI-FI Tuning’s fuses(Gold and now Supremes) in my Cary monoblocks’ mains and B+ circuits, for over 12 years, without a problem. That’s not counting when the occasional tube took a crap and the fuse did it’s job. Then again, that’s just my own(one person’s) experience, and- why should you take my word?.

It matters where the fuse is in the circuit. Please tell us where it is located, its rating and what it is breaking? Are you sure its in the DC HV path?

@audioman58  Take a look here fellow Audiophiles here is the resistance index as I stated
Silver and Copper top conductor ,look where zinc -steel is located on the chart this is your fuse conductor element.

I do not know of any fuses that use steel as an element. Do you?

From what HiFi Tuning says there is actually nothing about the construction of their fuses that could lead to any sort of bad outcome. Fuses are not really rocket science. You simply choose the wire for a given fuse based on whatever temperature you want the element to melt. It’s not complicated. On the other hand, there are certainly reasons not related to the fuse construction that could explain why fuses blow prematurely or whatever. E.g., operator error or the recommended amplifier fuse value was underestimated by the amp manufacturer. By the way, if the vibration damping tube in HiFi Tuning Fuses was actually a problem I’m pretty sure HiFi Tuning would have eliminated it by now. That’s just common sense. As I already mentioned, sand-filled fuses would constrain the plasma as much as a tube damper. Plus there are no issues will sand-filled fuses or liquid filled fuses or beeswax filled fuses, for that matter.

“HiFi Tuning has long been a fan of Germany’s legendary Mundorf capacitors. Revered in audiophile circles for creating gorgeous sounding no-compromise capacitors which grace some of the world’s best electronic designs, Mundorf capacitors are built using a special conductive material. Ultra-pure silver is impregnated with gold creating a material with gobs of resolution and golden warmth; glorious tonal color with truly outstanding dynamic shading, essentially the best of both gold and silver and absolutely no compromise. Each Supreme fuse uses this special material for its end-caps and conductive filament and pure silver solder connects everything. Inside the ceramic casing, Supreme fuses further distinguish themselves by receiving proprietary resonance and quantum treatments.”

@ramtubes: I thought I was pretty concise, when I stated, " I’ve had HI-FI Tuning’s fuses(Gold and now Supremes) in my Cary monoblocks’ mains and B+ circuits, for over 12 years, without a problem. That’s not counting when the occasional tube took a crap and the fuse did it’s job." My amp’s manual calls for a 3A slo-blo and a 500mA fast-blow(B+), YES- both specified 250V, which is what I’ve been installing. Do you just assume everyone you address is as incompetent, as your customer that blew up that ONE prized example?

I COULD also mention: when I auditioned a pair of Claus Bunge’s excellent Odyssey monoblocks, in my home, a few years back, I had occasion(with his permission) to remove the top cover of one. In the rail voltage(DC) fuse positions, lo and behold, were four HI-FI Tuning Golds. He’s apparently had the same success as I, with HI-FI Tuning fuses, in my modded Trans-Nova 9505, woofer amp’s output stage, rail voltage(DC) supplies.

It seems, quite a few that frequent this site, value the opinions of the Stereophile Magazine writers. Personally, I would think, they’d be somewhat conscientious, as much as they value testing things, before recommending a product/tweak, in their reviews and follow-ups. ie: https://www.stereophile.com/content/hifi-tuning-fuses and https://www.stereophile.com/content/hifi-tuning-fuse-follow-may-2012 It appears, no one(as of 2012) told them, about all those amps being destroyed. I’d further have to think, that highly experienced sellers(ie: Music Direct, VH Audio, Parts Connexion, The Cable Company, etc), would have been made aware(by now), were there an issue, and avoided selling anyone's, "high-end" fuses(and any possible, attendant liabilities). There again: Just my own observations/opinions.

Speaking of HiFi Tuning Fuses, crazy prices over on eBay for new HiFi Tuning Fuses, selected values and types. Check it out, Bubba!!

Those highly discounted, NEW Silver Stars and Classic Golds(from Burlington, Ontario), are probably being proffered by Parts Connexion.  

Post removed 

So sayeth Mr. Purple Nose. 

@kosst- "I’m gonna believe Ramtubes over snake oilers who’ve never built a circuit."??? Ever heard the saying about making assumptions? Of course, in your case(apparently), that ship sailed, LONG ago!

ramtubes has been on the warpath trying to debunk fuses for at least ten years. Watch out, ramtubes take em scalp. You can’t debunk something that’s not bunk. 

Hi Guys

I'm not going to speak to the reliability of fuses because quite frankly I've never had one blown or cause damage to any products. Maybe that's me just being careful. However I have had experience in how they sound as well as how they change sound depending on a few mechanical adjustments and material choices. I've now done fuse swapping on over 10 amplifiers and at the end of the day (2016) yes they do sound different and yes they do sound different per amplifier. Directional? Yes they actually are directional. But, can be trained to go the other way, just like cables can (some cables).

If I were to give a caution it would be these, watch out for the upward shift in tone and keep your ear on the bottom octave as the wrong fuse will get phazy sounding. Also keep an eye on your stage, because when you make a fuse change you are also going to make a speaker placement change more then likely, or even cable change. "everything affects everything else".


Directional? Yes they actually are directional. But, can be trained to go the other way, just like cables can (some cables).

>>>>That’s quite ironic because that is what HiFi Tuning said for quite a while. But, HiFi Tuning eventually scrambled on board the fuse directionality train and for the last, I dunno, eight or ten years or so they’ve been marking their fuses with that cute little diode symbol 🔜 and have also published on their website the Data Sheets that support the theory of fuse directionality. Isoclean from Japan has always promoted their fuses as being directional.

It’s really not that difficult to confirm the directionality theory since all fuses, even stock fuses like Littelfuse and Bussman fuses, are directional. I tried this successfully with stock fuses quite some time ago - fuses that had been in the system for more than two years. So, I would not buy into the theory that wire established direction over time. Of course, many high end cable manufacturers mark their cables with directional arrows for a reason. No, I’m not talking about the shielding. It also explains why Audioquest’s new high power cords, just like all of their high end cables including HDMI cables are controlled for directionality.🔛

Sours: https://forum.audiogon.com/discussions/hi-fi-tuning-supreme-fuse-burn-in
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HiFi-Tuning Fuses - Supreme Large 6x32mm SLOW Blow T

HiFi-Tuning Fuses - SUPREME Large (6.3x32mm) Slow Blow "T" TypeSlo-Blow

T=timed or slow-blow.  F=fast

Light a Fuse! Audiophile Grade fuses handmade in Germany.

Cryogenically treated.

Select size from pull-down menu.   Length: 32mm is approximately 1.25 (1 1/4) inches Long

Meet "El Supremo"- The new Higher-End black ceramic fuses from HiFi-Tuning Germany.

HiFi-Tuning of Berlin-Germany has released a new highest performing version of their industry-leading fuses called "Supreme"

The line of Supreme fuses is handmade, tip-to-tip of 99% Silver combined with 1% 24k Gold, similar to the material used in the Mundorf Supreme Silver/Gold Capacitors. Mundorf also developed for HiFi-Tuning, a special Silver/Gold solder for use in the Supreme fuses. HiFi-Tuning's 99% Silver + 1% Gold melt wire, used exclusively in the Supreme fuses, is resonance-optimized to control vibration.


To understand the advantage of the 99% Silver + 1% Gold combination, think about silver's crystalline structure. The drawing process for silver (or copper) wire causes micro cracks in the surface of the wire. The cooling process also results in imperfect crystal grid structures. Both of these "deformities", relative to the ideal of a perfect conductor, result in surface distortion when current flows through the wire. The addition of 24K gold fills the micro cracks and the empty spaces between the crystal boundaries to improve transmission properties, while also inhibiting the surface oxidation and tarnishing that will occur over time otherwise. These custom, precious metal fuses are also cryogenically treated using Europe's only cryo system from Cryogenics International (USA). Finally, the Supreme fuses are treated with a proprietary quantum level process. Fast and Slow Blow Supreme fuses are available now in most popular values in the usual sizes: 0.75" (5x20mm) & 1.25"(6.3x32mm).

Deep Cryogenic treatment.

Each fuse is handmade and tested in Germany. Silver endcap plating. Ceramic casing offers superior resonance characteristics.

One of the least expensive, highest return for your money upgrades available.  In our experience the HFT fuses is the highest performing upgrade fuse, and also has the advantage of using a silver "element" which will not degrade due to oxidation (silver oxide is a good conductor) over time, unlike the copper-based alloy elements in other fuse types.

HiFi-Tuning fuses have a tighter tolerance than standard fuses. A standard fuse typically has a 10% of stated value tolerance. The HiFi-Tuning fuses have a goal of zero tolerance. Care should be taken to order a fuse of the proper value. Check with the manufacturer of your equipment or other information source prior to ordering fuses. If a circuit was designed close the tolerance edge of a standard fuse and regularly goes over the stated fuse rating, a HiFi-Tuning fuse may blow right away, where the standard fuse did not. This is rare, but can happen. We don't recommend using a smaller value fuse, as they will often blow upon insertion. Using a slightly larger value (say 6.3A in place of a 6A) is often OK with a manufacturer, and may meet the circuit requirement and be rated within the tolerance of the original fuse.

We are an Authorized HiFi-Tuning Dealer.  Due to the delicate electrical nature of fuses, counterfeiting, etc., we cannot accept returns on fuses.  We do not offer for sale any fuses that have left our possession in order to protect your equipment.  Please review your order carefully and check your equipment for the proper fuse type before ordering.

Don't use 10 cent fuses in your high-end A/V equipment, Guitar Amps etc.. Beware of some commercial fuses with nothing more than gold plated end caps and nice packaging. These are the real deal.

Sours: https://www.revolutionpower.com/hifi-tuning-fuses-large-supreme-slow-blow-t
Fitting more internal Audiophile Fuses
Supreme Fuse

It is in the nature of things that manufacturers and developers praise their products in the highest possible terms. This makes it all the more satisfying when the products can keep their promises. And if the whole thing just costs 45 euros … jackpot!

This trial started with extremely low expectations: I should try out two microfuses to check whether a detailed test is worthwhile. To be honest, my opinion was already certain: It won’t work. Not because microfuses cannot influence the sound, but because some simply do not – or let’s say fairly – have no serious influence. At least that was my previous experience.


SKYbyGramophone logo 300x60 white background

I have already heard of HiFi-Tuning and Bernd Ahne in Berlin. But I was surprised to discover that Ahne has been known for years for his microfuses. That is why for me the two small fuses were just two out of the myriad of options available on the market. That exactly these two should now give me a hitherto unknown sound experience … no, by no stretch of the imagination.

Of course it all turned out differently …

The products

The two fuses are the crème de la crème from HiFi-Tuning. As far as Supreme³ fuses are concerned, the caps and fuse element are made of an alloy with 99 percent silver and 1 percent gold. The fuse element is therefore a small engineering marvel because, according to Ahne, it is the only silver fuse element with slow response – and is therefore suitable for microfuses. Initially, his engineers had given him little hope that such a thing could be realised at all. But Ahne didn’t give up … with success.

Supreme und Finger

To connect caps and fuse elements, a special, self-developed solder is used, which contains copper, silver and gold. In addition, the black ceramic body and an ultimate quantum treatment, which Ahne does not want to comment on any further … trade secret.

However, he makes no secret of the fact that the fuses are cryogenised, i.e. deep-frozen. HiFi-Tuning uses a high-quality system with special software that first cools the fuses down to minus 196 °C for 24 hours, keeps them at this temperature for another 24 hours, and then thaws them extremely slowly – adding plus 0.1 degree every 10 minutes. The whole process takes a week and serves to reduce tension and stress in the material and thereby improve the conductivity.

The Supreme³ copper fuse receives the same treatments as the silver-gold option, but of course consists of 100 percent copper. But not of regular copper, but of pure “Cardas Grade 1 copper” produced by American George Cardas.

Ahne himself was initially more or less indifferent to the copper thing until Cardas personally showed him microscope images of different copper types and it became clear that the crystal structure of these types differed significantly. That aroused Ahne’s interest – and in fact his engineers later certified that the conductivity of Cardas copper was the same as that of silver … actually a technical impossibility.

Consequently, caps and fuse elements of the Supreme3 ​​copper fuse consist of Cardas copper and have a wafer-thin gold plating (0.2µ instead of usually 5 to 10µ) since gold conducts less well than the used copper, but it is necessary as protection against oxidation. If you look closely, you will discover the Nautilus logo from Cardas on the front of the copper caps – a rarity that this logo can be used and thus a special sign of friendship between Cardas and Ahne.

It is also worth mentioning that – apart from Cardas copper from the USA – all other components come from Germany and the fuses are assembled by hand in this country.

Ahne himself makes no secret of the fact that his fuses are the best available on the market. Around 20,000 HiFi-Tuning microfuses sold annually worldwide are at least a house number other manufacturers can probably only dream of. Fuses are particularly popular in China and the USA, but business is also going well in South Korea, Taiwan, Vietnam and here in Germany.

The success is due not only to the gain in sound quality to be scrutinised but also to the price: Ahne deliberately chose a low retail price so that every HiFi fan can really afford the fuses. 45 euros per item, if you clarify the production costs once again, is a good bargain – Ahne could also easily ask for 200 according to his own statements. But it is more important to him to make the fuses accessible to the masses. My impression: The heart speaks of someone who could turn his hobby into a profession and love it more than anything.

Supreme Fuse

The operating principle

As much as a reminder of how it works here – enough has already been said elsewhere: The microfuse is the proverbial bottleneck through which the current that powers a device and from which the sound signal is generated has to squeeze – a wire barely thicker than a human hair. It is obvious that high-quality microfuses can influence the sound. The question is always the same: Do they actually do it?

The auditory impression

In this case, the answer to the question is very clear: Yes, they do it! And how! The more I heard, the more impressed I was. But first things first.

The trial listening mentioned at the beginning brought two spontaneous findings: The two fuses each provide more glamour and more openness. That alone I find astonishing enough for two inconspicuous components for 45 euros each – especially when you consider how many thousands of euros you have to spend on other tuning measures that don’t bring much more in the end. What exactly my hearing had picked up in terms of glamour and openness, however, only became apparent in its full scope when I started the detailed trial with more time and tranquillity.

First I used the Supreme3 copper fuse and started my listening session almost obligatorily with the album “Love Me Tender” by Barb Jungr (Linn Records 2005). In the first track “Love Letters” the Celesta sounded less sharp in the first few bars, but not a bit soft.

On the contrary: the keystrokes were clearer, brighter, shinier – and due to the lower sharpness, they lived up to their French word origin and sounded heavenly in the truest sense of the word. Barb Jungr’s voice, which started shortly afterwards, had more volume, was therefore more present and also clearer. And the cello in the middle of the piece impressed with more distinct melodiousness and much more audible vibrato.

Barb Jungr - Love Me Tender

The second track “Heartbreak Hotel” starts with individual piano chords. Here I immediately noticed the different facets in the reverb that I had never perceived before. The distortion and delay effects in the following text lines were also more detailed. However, the harp in the middle and at the end of the piece put the crown on everything: The additional sound information that was heard here meant that the instrument felt like it was right in my room.

In addition, the first thing that struck me about this piece was that the background to the music scene was figuratively blacker, so the silence was more impressive, deeper, more realistic. Everything that comes out of this black can only sound clearer and shinier. And the more details there are in the music, the more perfect they can be presented – which was already evident in Track 3 “Long Black Limousine” in the long instrumental intro: Here, for example, the squeaky synthesiser effects were a clear highlight.


MarleySupreme³ microfuses from HiFi-Tuning - Review

Now I switched to the Supreme3 ​​silver fuse and listened to all three pieces again. I have had different experiences with silver at different points in the sound chain – not just good ones. For me personally, the extra resolution is often too much. Not so here: All the sound enhancements that I have described above now got the cherry on the cream.

Instruments and voices sounded even more precise, even more detailed, on the second track I thought I could even notice a touch of (intended?) Barb Jungr’s hoarseness – a detail that was completely new to me. It quickly became clear: The silver option was a little crisper and even higher resolution, the copper option a little warmer, but hardly less detailed.

This impression was confirmed in the further course: I switched to Cataleya Fay’s album “Journey” (electromantica 2015) and chose the sixth track of the same name. I had very good memories of the recording quality and was quite astonished at how dull and downright the song sounded from my speakers.

Cataleya Fay - Journey

Of course, I had reset to the standard microfuse to find my way back into the piece. Conclusion: It just sounded boring. It was only when I switched back to the Supreme fuses that I started to enjoy it. The stage was built much more realistically in front of me, the guitar strings sparkled more beautifully, the plucking noises were more detailed, the voice, as with Barb Jungr, was more present, warmer, but also clearer.

The more details emerged during the piece, the more beautiful the sound experience was. For example, the choral parts in the second stanza now stood out perfectly from Fay’s voice and thus complemented it much more impressively. The fine dynamics of the percussion was higher towards the end, everything sounded faster and crisper. And the reverb was just great when the last note faded away.

The silver option made everything even more accurate here and made the strings in the second stanza shine: The violins sounded finer, the cello more sonorous.

Both fuses had now adequately proven creativity and aesthetics. The question then arose how could they handle the bass range. I got out a CD that I hadn’t listened to for a long time – Supertramp’s “Brother Where You Bound” (A&M Records 1985, Remastered 2002).

Supertramp Brother Where you Bound

First I used the standard fuse and then switched back to the Supreme copper one. I would definitely classify the recording as the most audiophile of all three used here and thus it was not surprising to me that right at the beginning of track 3 “No Between”, when track 2 fades away and the carillon begins quietly, the atmosphere between the tones was just amazing and immediately pulled me into the song.

The carillon itself sounded totally clear and fine, the percussion effects in the further course were just blatant and the saxophone at the end convinced with more reverb, more melodiousness and interestingly with a little more rigour, which was important here for the instrument to make it look more realistic than before.

But all of that was just an accessory, because I knew that the piece came up with little bass in purely quantitative terms, but then it was all the deeper and stronger and the diaphragm was massaged comfortably. I was not disappointed: What was not bad with the standard fuse became a wow effect with both Supreme options. Because the force with which the occasional bass strikes now ended up in my pit of the stomach was phenomenal. A perfect mix of control, dynamics and bass power.

Supreme Cooper

The conclusion

If you are still using standard microfuses, you should change them now. The effect is said to be even more pronounced on devices with high power consumption than on source devices. Not to imagine what potential can still be unleashed.


The price

Both Supreme³ options cost just 45 euros each. A bargain considering the sound quality improvement!

Supreme Cooper


Distributor in Germany:

Sieveking Sound GmbH & Co KG
Plantage 20
28215 Bremen

More information about the microfuses can be found here: www.sieveking-sound.de/hifituningprodukte.html  

A list of retailers can be found here:www.sieveking-sound.de/haendler.html

Global sales:

HiFi-Tuning, Inh. B. Ahne
[email protected]

Supreme silver

Trial unit

  • Amplifier:                                            Devialet 120
  • Player:                                                 Naim CD5si
  • Speaker:                                              Duetta (modified)
  • NF cable:                                             Aircell 7 NF cable with WBT-NextGen
  • LS cable:                                              NovaPad speaker cable
  • AC cable amp:                                    VOVOX Textura power cord 1.8 m
Sours: https://www.audiophil-online.com/review/power/supreme-microfuses-from-hifi-tuning/

Tuning fuses hifi


This is The Cable Company master listing of all audiophile fuses. Most audio electronics contain at least one of these to protect the component from short circuits, surges, and other electronic ailments. The problem from an audiophile's perspective is the low-quality materials that are used to make commercial versions. The conductive metals fall into the sonic category of "junk metals," and the typically tin plated end caps are little better. Certainly not materials that any self-respecting audio designer would spec into his component designs given a chance.

In fact, from a parts perspective, audio fuses are often the weakest link in the entire component! This is especially true in high-performance components, but the beneficial impact of an upgrade fuse, even in a modest system, can be startling.

And it is good value. There is a lot of leverage to upgrading a choke point in your system.

Let's talk choices:

HiFi Tuning fuses consist of two versions. In the pure silver "SilverStar" fuse both the end caps and melt wire are all silver tip-to-tip. A ceramic body for its better resonance characteristics and cryogenic treatment take this one up another notch.

HiFi-Tuning takes conductivity even further in their 99% silver, 1% gold "Supreme" fuse, which also incorporates additional resonance and quantum level treatments courtesy of a company called WA-Quantum.

The Furutech and Isoclean brands go for a copper melt wire. But this means no true fast blow versions are available from these manufacturers - slow blow only. Furutech fuses use a rhodium plating on the end caps to inhibit oxidation, while the Isoclean fuse uses gold plating.

Audio Magic fuses take a different approach, starting with as a commercial version but then surrounding the melt wire with a conductive polymer. In their top model, they also put a layer of RFI and EMI shielding material around the outer body.

Synergistic Research fuses are treated to 2,000,000 volts of "Quantum Tunneling" to elevate their performance and come with a 30-day satisfaction guarantee.

No one knows more or sells more audio fuses than The Cable Company. Let's talk upgrades.

Connect with our Audio Gurus at 800-FATWYRE or 215-862-4870 or Send email or use Contact form.  

DID YOU KNOW: We try to make most of our products available for in-home audition through our Cable, Component and High-End Headphone Library.The only Library of its kind.

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Sours: https://www.thecableco.com/accessories/fuses.html
IsoClean Audio Grade Fuses, an explanation by True Audiophile

Powerline Accessory Reviews

Tweaks come and go. When a new one creates a buzz in audiophile circles, I generally prefer to wait and see if it's still around after the initial excitement has subsided. I'd heard about "audiophile" fuses some time ago, and although the likelihood of them making a significant difference didn't seem as farfetched as such tweaks as the "intelligent chip" or the "clever little clock," I didn't feel inclined to try them. I was persuaded otherwise by the confluence of two separate influences: a report by Michael Fremer, in the February 2007 Stereophile, that the HiFi-Tuning fuses produced a "subtle but noticeable" improvement in the sound of his Musical Fidelity kWP preamplifier; and an encounter at the 2007 Consumer Electronics Show with Robert Stein of importer Ultra Systems (the HiFi-Tuning fuses are made in Germany), who said that they produced a big improvement and offered to send me some samples.

When you think about it, the notion that a fuse can make a difference is not that implausible. If, as most designers of high-end audio electronics will admit, the kind of wire used for a component's internal wiring can make a difference, then why not a fuse? After all, the job of the fuse is to melt when a certain level of current is reached, so might there not be differences in how various fuses react to current at lower levels, possibly constricting or otherwise influencing the power used by the component? The HiFi-Tuning fuses use pure silver wiring, gold-over-silver endcaps, and ceramic rather than glass casings for better resonance characteristics. But a plausible mechanism of action and the use of high-quality materials are one thing; audible improvements are something else.

My first test involved the PS Audio GCC-100 integrated amp, a product I hold in very high regard; if its performance could be improved simply by replacing a fuse, that would be great. I talked to the PS Audio folks to find out what the GCC-100 uses in the way of a fuse, and was told that it uses two, both located on a circuit board, and that accessing them was a bit tricky. Before tackling the job, I unplugged the GCC-100's AC cord for a couple of hours to allow its capacitors to discharge, then removed the screws securing the chassis cover and gently lifted it a bit, looking for the wiring harness that would have to be unplugged before I could proceed. Once I'd located and unplugged the harness, replacing the fuses was pretty easy.

Before doing any of this, I spent some time listening to the GCC-100 to refresh my memory of what it sounds like. Yes, the tonal neutrality, resolution, transparency, and rhythmic thrust that had originally impressed me were still there. If the HiFi-Tuning fuses were to improve on this, they had their work cut out for them.

But improve the sound they did, and not just marginally. The PS Audio GCC-100 now sounded clearer, more dynamic, with improved transients—simply better all around. The difference was big enough that I didn't feel I had to go back and forth between fuses to convince myself that I was hearing it. But I did so anyway, if only to satisfy myself that what I was hearing was not the result of the mere act of replacing fuses, which to some degree can't help but serve to clean the contacts of fuse and fuse holder.

It wasn't. The improvement in sound was far out of proportion with the $60/pair cost of the HiFi-Tuning fuses. (Under its Critical Link label, PS Audio markets special fuses for its own products that are priced about the same as those from HiFi-Tuning. I briefly tried a pair of Critical Links in the GCC-100, and they, too, produced an improvement over the stock fuses.)

As I note in the main body of my Onkyo A-9555 review, the A-9555 benefited similarly from the use of the HiFi-Tuning fuses. As with every tweak, your mileage may vary, but the HiFi-Tuning fuses, available from www.ultrasystem.com, represent what I found to be a very worthwhile sonic improvement for a relatively small investment.—Robert Deutsch

Go Blow a Fuse, Michael Fremer, February 2007 (Vol.30 No.2):

When I was a poor audiophile, I loved tiny tweaks. Without switching out components, I could improve my system's sound without spending too much money. Bypassing or replacing cheap capacitors, cleaning connections, applying Star typewriter-cleaning gum to vibrating headshells, and other tiny tweaks made memorable sonic improvements.

I recently replaced the cheap fuses in my Musical Fidelity kWP preamplifier with fuses made by HiFi Tuning in Germany, sent to me by The Cable Company. These have silver filaments, ceramic bodies, and gold-over-silver terminations, and damn if they didn't seem to produce a subtle but noticeable improvement in smoothness and coherence. For less than $30 each (available in various sizes they're worth trying, if only for the diversionary entertainment.—Michael Fremer

Sours: https://www.stereophile.com/content/hifi-tuning-fuses

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