Re: 4 Volt Outputs - what does this mean? (Fahrfrumluzin)
The 4 volt output refers to the amount of ac voltage coming out of the pre-amp outputs on your Clarion deck. If you popped a test cd in your deck and played back a 1khz test tone at full volume while measuring the pre-amp outputs with a voltmeter on the "AC" setting you should see around 4 volts. The idea is that the high voltage helps overcome induced noise from things like power cables, since you won't need to turn the amplifier gains up as high (the gain on an amp is not a volume control, but a level matching device). The thing they don't tell you is that when your listening to the deck at 1/4 volume your voltage is more along the lines of 250 millivolts. What happened to that noise cancelling 4 volt output? While a high voltage deck is important an even more important feature that is often overlooked is the output impedence. The lower, the better. A low impedence output deck resists induced noise better than just a high voltage deck because the impedence is constant, not variable with the volume.