Quote:
Originally Posted by Hebz
Btw - Wtf is pre-amp outputs and their voltage difference?
Heb
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I highly recommend going 4 volts! You will get better dynamics, headroom and much less hiss from the signal. This means you can turn it up as loud as a 2 volt HU, but with cleaner and better sound quality that you can easily notice.
but i like this guys deff of it as i was at a loss for the right way to frase it and he got it spot on...
"Your amplifier is receives a low voltage from the head unit and increases it to a higher voltage (and current). This voltage is music. The problem is, electrical noise may be present and that too will be amplified resulting in alternator whine, ignition noise, etc. If you turn the amplifier gains down, the electrical noise is amplified less, but so is the music. The higher voltage head units put out more so you can still get satisfactory volume with the power amp gains reduced thus the system sound to noise ratio is improved!"
hope this helps man