So done with audiophile fuses

My amplifier doesn't have a fuse anywhere

sugabooger"You continue to amaze, astonish, and sadden me with your willingness to argue about a critical safety issue with which you have no knowledge."

You assume, surmise, and speculate on matters of which you have little to know direct understanding, knowledge or experience  and this is a mtter in which I happen to be especially well informed.

"While in the US, an NRTL test is not technically required"

Right that is what I said so you can spare us the pronouncements, arguments, and what some Americans would call "bleeting."

"Just stop ... don't start typing a reply unless you are very familiar with this. This is a safety issue."


I have not stated, suggested, or implied anything unsafe, dangerous, or hazardous I have only corrected you're clear, obvious, extreme errors in statements which you present as unassailable, immutable, unimpeachable facts. 

I will not stop replying to those posts I deem worthy of a direct, correctional, factual response. 

Out of curiosity I peeled the label away on my blown SR orange fuse.  It looks like a ceramic fuse with modifications was used.  I don't know what brand it is and am not bashing SR.  Others may know what it is.  Pictures on my virtual system.

What is stamped on the end cap?

That looks like one from Guangdong Sinobile Energy Technology Co.,Ltd

edgewound, there are no markings on the end caps.

Results of my fuse replacements by solid copper wire. I DO NOT RECOMEND THIS FIRE HAZZARD, but here's my test results: Listening tests performed with subs turned off, music; Dark side of the Moon, Boiling Point and Famous Blue Raincoat. With all program material, the sound was much more detailed and had better clarity. Each album had its own distinct improvements. DSM-Tighter bass and bells seem to jump out at you. BP-Holy cow, so much detail and clarity, I was stunned. FBR-Vocals had noticeably more detail and clarity. I could understand all of the lyrics better (I don't have the lyrics memorized). Amplifier; 120 W/channel rated by manufacture, 8 ohm, 1% Dale load resistors in oil bath. Tested with standard fuses before modification: Summary, 153 Watts/channel rms at clipping, both channels driven, continuous averaged 20Hz. and 20kHz., duration at each frequency; 10 seconds. After modification: Same frequencies and duration used, 172 Watts/channel rms at clipping. Voltage burst test, pulse duration 400 ms, test frequency 1000Hz.: 39.59 Vrms (196 Watts). I did not do the burst test before modification, so I don't have that data. I did not do any distortion tests as I sold my HP distortion analyzer to a friend before I moved. Sure wish I hadn't, but maybe I can borrow it? You know my conclusion… Of course, this does not validate discussion topic, but clearly resistance in series has a detriment to the sound and output current.

Curious, did you equalize volume levels using a SPL before your listening tests?

Another observation on the unwrapped SR fuse. From the image, it looks as if they applied a graphene paste to the fuse before they wrapped it in their foil backed SR sticker. Perhaps these two additions to the stock fuse is part of their proprietary process that may have some added benefit.

nwres158 posts05-20-2021 2:56pmAnother observation on the unwrapped SR fuse. From the image, it looks as if they applied a graphene paste to the fuse before they wrapped it in their foil backed SR sticker. Perhaps these two additions to the stock fuse is part of their proprietary process that may have some added benefit.

A couple observations with your statement.
Graphene is an excellent conductor. A foil decal is also a conductor. It would makes sense that either and/or both of these adjuncts could bypass the fuse filament creating a higher flow of current through the entire fuse assembly, leading the the filament to fail at it's rated amperage.

If this is indeed what is happening, I doubt a whole lot of critical engineering went into this device by the "Lead Designer".

mitch2 - I did not make sure the sound levels were exactly the same in before and after listening. Measurements and ears could sense improvement.