When i turn my volume all of the way down i hear a hissing noise very soft but drives me nuts does it on cd, radio, or ipod. ive changed my rca's, HU, comps, and amp any ideas?
well, some noise is expected at no volume, but if its exsissive, then check the gains. An amp will only amplify the noise. It could be rca issues as well as the HU as suggested . GL. Polo.
if you have a hissing noise in your sub, check for a pop noise when you put your car in park or neutral or reverse, if it does that, check your positive terminal on your battery, see how many volts are coming in. Other than that its the RCA's