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Hi-Fi Fuses - SNAKE OIL? - or something in it?

There's a lot of chatter about the benefits of those high prices gold plated fuses with silver conductor etc. etc. all over the web and the consensus ranges from FANTASTIC!!! to much more subtle observations.

It makes sense to me, epseically in light of spending lots of $$$ on good power cables, that having a skinny piece of aluminum conductor in a glass tube (i.e. a cheap fuse), in the power loop would be detrimental to the performance of the components.

I decided to revamp my DIY power supply I'd built for the Cambridge Audio 640p phono stage and DACmagic in order to test this out - and since it's a DIY project there is no UL Certification to void.

First, I bypassed the fuse link completely to confirm there would be an improvement and give me the best benchmark to compare against - YEP - BIG DIFFERENCE - much more this, that and the other :-)

So then I started looking for hi-fi fuses - WOW!!! - talk about pricey.

Two fuses for the power supply was going to cost $120+ AND I thought I'd probably have to buy a better quality fuse block to make the most of those fuses.

Then a moment of enlightenment - most power supplies and conditioners are protected by pushbutton breakers and not fuses.

I found breakers of the required current rating and installed them into the power supply. I imediately noticed that there was no deteriation in fidelity when compared to the same unit with the fuse link bypassed - GREAT!.

On reflection, the fuses I had in place were rated at 3 amps - so they use a pretty thin fuse wire in them. If I had used a fuse of a higher rating, i.e. it uses a thicker conductor, then I believe that there would be less of a difference between the fused and bypassed implementations

SO - do the expensive fuses work?

Well the empirical evidence out there would suggest they do
- I do know the cheap fuses are not good!

I know bypassing them does improve the sound - a lot in my case
- BUT THAT'S NOT SAFE FOR ONGOING USE

I know breakers work as good as bypassing the fuse
- BUT MESSING WITH A POWER SUPPLY VOIDS UL CERTIFICATION - NOT GOOD!
- FYI a couple of licensed technicians I know WILL NOT change the design of a power supply at all.

I believe the amount of benefit is related to the fuse rating
- but don't go replacing 3 amp fuses with a 20 amp fuse - that's not safe either.

Whilst looking for fuses I discovered AMR Gold fuses priced at $20/fuse.

Now that's definately more affordable than most others at 3-4 times their price.

One supplier I know of in the US is Avatar Aacoustics

If you have had experience with quality fuses please share - especially if they are "modestly priced" i.e. $20-$30 per fuse. And please provide a source :-)

Also, can anypne confirm that Slow blow fuses are better than regular?

And Remember - IF YOU AIN'T LICENCED - GET A TECHNICIAN!

Many Thanks
williewonka
mapman's avatar
mapman
22,927 posts
 
I have no doubt that all fuses are not created equal and can affect the sound at least in some if not all cases.

What I am not as sure about is if high priced fuses marketed to audiophiles are required to do the job.

I suspect there are well designed and constructed general purpose fuse products out there that might do the job well and cost less due to the nature of the product and its target markets (ie not audiophiles willing to spend whatever all in the quest for better sound).

After all, fuses have been around forever, are used in a myriad of applications. THere should be lots of really good ones out there for common market prices I would suspect.

That's just my gut feel. I have no special knowledge or experience with various fuses in audio gear to say for sure.

If the audiophile fuses seem to do the job better (and still protect the gear as they should) then more power to them and their users. The extra money might be worth it if it makes the task of finding a good fuse to use easier. But I do suspect that if a study were done, it might find that audiophiles payed a premium for a good product for the job compared to others. WOuld not be the first time they did that, for sure! :^)

Agoner BryanCunningham, who's opinions I respect, recently graciously did some testing of various fuses, including the more generic kinds as I recall, and reported findings in another fuse thread here. My recollection is he heard some differences fuse to fuse but his findings were inconclusive in the end.

So in the end, one's gut feel or educated opinion perhaps on the issue is probably the only real thing that one can rely on.
geoffkait's avatar
geoffkait
23,365 posts
 
Mapman wrote,

"There may be other ways to accomplish that as well so in that sense they might be compared to a band aid, though the defect they address might never actually heal itself and most likely would get worse before it gets better."

Like the Intelligent Chip and Rainbow Foil or Cable Wraps from Highwire and Shun Mook, or even the Mpingo Disc from Shun Mook, even such pedestrian things like Tube Traps and acoustic resonators, not only do WA Chips bring things to the table that cannot be gotten some other way - one assumes you mean buying better components - LOL, don't you wish? - but they are essential for getting that "live, holographic sound, if you know what I mean. What we might actually have here is East is East and West is West and n'e'r the twain shall meet.
mapman's avatar
mapman
22,927 posts
 
"Like the Intelligent Chip and Rainbow Foil or Cable Wraps from Highwire and Shun Mook, or even the Mpingo Disc from Shun Mook, even such pedestrian things like Tube Traps and acoustic resonators, not only do WA Chips bring things to the table that cannot be gotten some other way - one assumes you mean buying better components - LOL, don't you wish? - but they are essential for getting that "live, holographic sound, if you know what I mean."

SOmehow, I have that live holographic sound without any of those. Go figure!

GEoff, you appear to be suggesting that using these products should be ones first priority for achieving the sound you describe. You are doing people a great disservice and damaging your own credibility even further, as usual.

OF course, you are a vendor of esoteric tweaks yourself, so your motives would seem to be apparent.
charles1dad's avatar
charles1dad
10,250 posts
 
Lacee,
I don't understand the ridicule you experienced on another forum.If others have different results (and some will) that doesn't change your own experience. Why is that hard for others to accept? The 160.00 I spent for the three SR fuses was a fine value given the outcome in my system(there's a 30 day return policy). If someone finds a 10.00 fuse that's as effective, by all means please let the rest of us know.I imagine no fuse would likely sound even better but I'm not taking the risk to find out . Safety first.
Regards,
jeff_jones
418 posts
 
Has anyone ever seen the factories where the hi priced fuses are made?

I think this is all about putting decals, shiny plating and fancy packaging on plain old industrial fuses, but if production facilities exist somewhere and can be toured then that makes things more interesting.
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