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
I looked at the fuse and there is no indication if
this fuse is fast blow or slow blow. I called and asked
sony and they said they are slow blow but I think they're
lying to me.
This one is for Gbart I happen to like sony es receivers
and I don't care for yamaha, nad, denon, etc. or any
other brand. The answer to Tls49's question is obviously
to get better sound.
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.