I'm looking to upgrade my HU to a Pioneer but it only has a F/R preout.<BR><BR>I just got a mono amp / subwoofer to install in the car so was wondering if I should spend more for a HU with a sub ...

I'm no expert, but from what I've seen, a pre-out is a pre-out and is not necessarily designated for a sub unless it says it is. If you just use the regular preout (the same preout you would use to ...