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slow blow or fast acting fuse

Hi I was hoping someone can help me, I have a
sony str-gx69es receiver and I wanted to upgrade
the fuses.The fuses for the power supply are
125v 4a and 125v 8a. The other two are for the
speaker impedance selector which both are 125v 8a.
I would like to try some hi-fi tuning fuses but I
don't have a clue if they are fast acting or slow
blow. I appreciate your help. Thanks!
128x128speedy9194
jjrenman
279 posts
 
If the fuses are the originals, the designation on them should tell you. IME, the power supply fuses will be slow blow and the speaker or output fuses will be fast.
tls49's avatar
tls49
1,351 posts
 
I am curious why you want to use these fuses in a 20 year old surround receiver.
gbart
290 posts
 
Why even waste the time trying expensive fuses that are unlikely to make much if any difference with such a receiver ?
geoffkait's avatar
geoffkait
23,365 posts
 
They made a difference in my 35 year old Fisher 500 C.
gbart
290 posts
 
It is not normally my practice to make generalizations, but a Sony receiver is not in the same class as a Fisher 500C. I have loads of restored vintage equipment, and a nice sounding old skool Marantz SR-19 AVR. Would I bother trying expensive HiFI tuning fuses in them ? No. IMO, the OP's money would be better spent having a tech give his Sony receiver a checkup. If bias or DC offset have drifted, adjusting them may prove more beneficial.
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