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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!
speedy9194

Showing 2 responses by jjrenman

jjrenman
279 posts
 
Again, power supply fuses are almost always slo blow. Otherwise the turn on surge would blow them.

Speaker fuses are always fast blow. Otherwise it would take to long to effectively protect the speakers or the output stage.
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.
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