A friend gave me a little 50watt amp, I installed it and everything but it's not working.

I thought it wight be the grounding at first, but I have it grounded properly and everything.

Now I'm thinking the fuse may be too big for the amp, would that cause it not to work at all?

The fuse came with the wiring kit, I got the smallest one that was available at the time.

try a bigger amp fuse and go from there

im pretty sure the fuse has nothing to do with the amp but it wouldnt hurt to get a smaller one by the way what size fuse is it im big into car audio i know a lil bit im runnung 2 1600 watt memphis mojo 12's on a 1000 watt amp with a 20 fuse and it works great it had a 30 but didnt work to well so the fuse may be the problem if not than i think you got yourself a fried amp

Yeah, that's what I'm thinking.

I was thinking maybe it needed a smaller fuse at first, but thinking about it, it didn't make sense from my understanding.


It's a 20 fuse now.

20A fuse for 50 watts is well over its needs. 12 volts running 20A current can generate 240 watts. Here you should remember that thin wires passing 20A can be too much and they start to heat up and eventually melt (but that's only when that 50W amp of yours shortcuts to ground).
For 50 watts (and 12 volts) 7,5A or 10A fuse would be something I'd install at work, to be sure that the fuse will burn before anything else after it if some failure takes place.

But why doesn't the amp work?
Does you headunit control the amp properly?
Are line-out wires from HU to amp connected well?
If both are ok, I'd measure the resistance between "remote" and ground, if it's infinite (in other words not connected in any way) I'd ask my friend why he gave it for free =)

the only time a fuse will cause it not to work is if it is blown


the idea behind ia fuse is to stop power surge that would damage it

if it had an over size fuse when you got it i would guess it already got fried

by a power surge after they put it in

just a thought

but hey

what do i know