static noises

touch and hold the negative lead to the chassis of the radio .. . i dont get that part sorry

Of the meter.  touch the black lead of the meter to the chassis of the radio when checking the voltage.

okay ill see if i have a meter. what do i suppose to see when i check it?  if the meter is moving that mean its good or bad? you what im talking about? and the noise occurs alot when the bass drops what does that mean?

When I first install it sounded perfectly fine. The max volume on my deck is 35, and I put it up 2 30 but it didn't sound so clean. 25 26 was the volume was just right. I hooked up some Insignia speakers and they sounded okay, the spec are 35rms/70max. Do you know why my speakers sound way better when the engine is off? It can be many reasons why my speakers sound like this. Oh btw, my 6x9's (Alpine Type-S) they are fine, they don't give out static noises.