Replacing fuse

It could cause damage to the component.  Because the 8 slo blow has a higher threshold before blowing.  Why did the 6.3A blow?   Right there it tells you not to invite damaging your equipment.

No problem in fact many high end fuses are very accurate  and have actually poppedon startup for the cheap steel fuses can vary over 15% we have tested these . Curren Lumin in my Poweredsub, And big Gato Audio 400S I went upfrom a 8ampto 10. It is not an issue unless something in the circuit went bad orahugepower surge which youshould have line protection at your breaker box 
in in the System Brick wall Audio makes very good ones forthe money and beat ones 5 x their $300 price tab limodifyed mine 
with topparts. Try IFI Audio they thane excellent AC ,and digital purifying youjust pluginto a socket or digital line.for  $100 each 2-3 
of them is a clear audioupgrade .theSynergistic bluefuses ifound 
Excellent also. Just a few tips ,pls try a Stabilant -22 great contact 
enhancer,adteryou clean terminals with good 90% or better Isopropyl alcohol, and lasts on contacts if notremoverover 12 years NASA , and many high tech military companies use this .
not to be confused withcrap that was buying this and diluting        it 8-1 buy direct for $60 .much better then Caig , or messy pastes.

As an engineering stand point about a 20% extra toleranceis built into anyGood quality audio product for longevity and allowances forpower variances 
surges,and or power sags.my uncle has been a master design ,technician for 40 
years , with these high fi fuses IHave had popped 2 fuseswitha red wine amp 
on startup some amps ramp up fast .vinnie said just go up one size higher .
nota problem since . This was several years ago  just as a example .
youalso have a circuit breaker in one on power conditioning and in your home 
circuit breaker box .comments on burning your home down .
is totally unlikely with breakers in several locations asa fail safe which most Audiophiles have . If you have a dedicated powrrlibeto your components 
,or even if you don’t a 15 or 20 amp breaker is in yourcircuit breaker panel.
and as mentioned before. IFI Audio has plugintothe wall and power strip forprotection  as well as purifying for $100each, digital a bit more and workwell.

You have to wonder though, your paying $100 for a "special magic" fuse but yet they can't even get the current rating that it blows at right??!  Something that the 3$ bussman has had nailed for 30 years???!!  But yet they are supposed to sound waaaaaaaaay better.....
🙄Right

Nothing wrong with the stock fuse, just wanted to hear if the was any improvement in sound quality with an audiophile fuse.