Amp Question

WhiteHawk said:
I had it installed in my last 4th gen and it had less than a foot of ground on it to the wheelhouse panel. Could it be that the capacitors are just getting old and not working as well any more? The amp is 30 years old. Can you get the boards re-soldered and all the aged parts replaced?

It just bums me out that it isn't cleaner because every time I try to replace it the replacements fall short. In my 4th gen I had it running a dual voice coil 10" JL W3. I pulled it for a 250 Watt JL Audio Amp that the guy at the store promised me would hit just as hard. It wasn't hitting half as hard as the 150 watts out of the Power 300. Something about that old school power.

-Geoff
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a power 300 was rated at 300 on a bad day with a shitty power supply, new amps are rated in a perfect install with lightning striking the amp, possible the 300 could use a recap open it up and see if they are swelled
 
WhiteHawk said:
I had it installed in my last 4th gen and it had less than a foot of ground on it to the wheelhouse panel. Could it be that the capacitors are just getting old and not working as well any more? The amp is 30 years old. Can you get the boards re-soldered and all the aged parts replaced?

It just bums me out that it isn't cleaner because every time I try to replace it the replacements fall short. In my 4th gen I had it running a dual voice coil 10" JL W3. I pulled it for a 250 Watt JL Audio Amp that the guy at the store promised me would hit just as hard. It wasn't hitting half as hard as the 150 watts out of the Power 300. Something about that old school power.

-Geoff
Click to expand...

Electrolytic capacitors usually last about 15 to 20 years, then they dry out and begin to drift. The noise you are getting could be from the filter caps in the power supply of the amplifier. This is pretty common in home audio amplifiers as well. If the parts are hole mounted, it's a pretty simple repair. Just buy caps that match the values and you're good. If they're surface mount, that's when things can get tricky.
 
Tin said:
Electrolytic capacitors usually last about 15 to 20 years, then they dry out and begin to drift. The noise you are getting could be from the filter caps in the power supply of the amplifier. This is pretty common in home audio amplifiers as well. If the parts are hole mounted, it's a pretty simple repair. Just buy caps that match the values and you're good. If they're surface mount, that's when things can get tricky.
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through hole this is 80s built in a garage technology,
 
moneypit said:
through hole this is 80s built in a garage technology,
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I don't think they'd use small surface mount caps in a power supply either way. Those things are tiny. They're most likely to be found somewhere in the output stage. The power supply caps in my NAD amplifier are huge.
 
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