HELP: My amp is buzzing?

[myflow 10+ year member]

So I turn the key in my jeep's ignition...

vroom-vroom-VROOOOM!

-engine running, but I hear an extra buzzing from behind me-

I lean my head back to see where it's coming from, and it sounds like my sub is making the noise. At this point, my head unit is on, but the volume is down to zero. Mind you, my amp has always kicked on a little late. Like 6-7 seconds of hearing the actual music, the bass will finally kick in.

So anyhow, I put my head in the back seat, and the buzzing is coming from my amp. It's not too loud, but loud enough to hear. (And I'm half deaf. Thanks, 15"L7.)

The buzzing goes away with say... 1-2 minutes of playtime, but it worries me that it's there in the first place. The amp is a PA3000. Anyone have any suggestions? I'm running it with a 2 ohm load to a single 06 L7 15".

Thanks

-Jason

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[nVRuckus 5,000+ posts]

alternator noise, is your powrr and ground running next to your RCAs from the front of the car to the back?

 

[CBRworm 10+ year member]

It is probably something in the power supply of the amp. I have a couple of amps that make noise - in my case it is supposedly bad caps. One day I will get around to fixing it, the output is fine on mine.

 

[dflw_99 10+ year member]

:mine did that as well

i just adjust my low pass-full-high pass. my amp does this if it is set to full and high pass but if you turn it to low pass the noise goes away

dont know why tho??? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif