Bad Amp?

PatO · 02-10-2003, 08:30 PM

About a year and a half ago, a friend of mine gave me his 8" sub with a big custom box. Sounds awsome in my Jeep (no trunk). I bought a cheap amp and promptly removed the volume control daughter board and mounted it near the drivers seat (Minnesota meet guys have see it - pretty slick).

Anyway, it recently stopped working. The amp lights turn on, but no sound from the sub. I hooked a portable walkman up to the amp inputs - still no sound. Since I have no replacement sub or amp to try switching the parts out, I don't know which went out.
Is it safe to say that when subs die, they make no noise at all? I doubt it.
I hooked a voltage tester (DC, lowest setting) up to the amp outs on a loud song and it didn't budge.

Do you folks have any suggestions how I might go about testing the amp and the sub? Perhaps any methods for generating a safe test voltage for the sub?

Thanks!
-Pat

frodobaggins · 02-17-2003, 03:26 AM

Test for the sub, 9 volt battery.

Gutter · 02-17-2003, 01:00 PM

Did you check the fuse?

PatO · 02-20-2003, 11:14 PM

Thanks for the battery tip.
I tried it - no sound from the sub. I then tried the voltage tester again and was able to get a reading from the amp! (stupidly remembered to set it to AC this time!)
The sub was bad. Bought another one and it makes noise again. Cool.

I always thought that when speakers went bad it meant that their cones were torn. I never figured that their internal circuits burnt out...

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