some questions
Alex
If your wanting to give them the power they need. I recommend some filters, high to low level converter (pac makes a good one) and a good 4 channel amp (rockford fosgate comes to mind)
A head unit will not produce what they say they will. When you see a HU that says it will put out 70x4 (280 watts). Ask your self, how big is a real 280w amp and look at the size of the HU.
Panasonic has been putting tri-path chips which are the most in terms of watts so far for a HU. That maybe an option worth looking into for you.
also if u get that HU later if u decide to add a sub u will be fine withnothing more than a sub amp to buy.
as for what 2muchricemakesmesick said : he is right with the headunits saying like 50w x 4 that is rated max power, RMS u are getting like 15-20watts per channel, but it still does not compare to the sound of if u bought like a 25watt per channel fosgate or what ever good name amp.

