Should I buy a new HU for a better Preamp voltage?

[MrSkippyJ]

That's true, it's just not nearly as noticeable as people think. SQ people with their cars nearly isolated from outside noise and engine off will notice. Unless you are doing that OR have a large number of amplifiers it is very doubtful you will notice the difference.

[bcbrassard]

I guess I could end up getting like a EQ/Line Driver? Would that work to boost my RCA's Voltage plus let me run another set of RCA's for a 4 channel? http://www.sonicelectronix.com/item_6655_Clarion-EQS746.html

That EQ would work for what your looking for if its more cost effective than buying a HU. Total depends on what your gaols are? Hell i ran the Cheap Pioneer that came in the car i bought, I think it had one rca preout and i used the high volt speaker signal and hooked it up to my LC7(linedriver) to convert into more rca outs and using my DD-1 to tune everything it made a cheap deck sound great with more preouts.

[SIDE SHOW]

some of the jvc EXAD decks let you change the preout voltage from 2v to 8v I think it was, kool little feature (in your position i'd look at upgrading the deck)