Originally Posted by volzalum
If you search on the internet now you can find the Alpine PDX-2.150 for less than 200 new (~190) and the PDX-4.150 for less than 400 new (~340) ... that is total shipped price.
The Alpine 2chnl would only net him 50 watts rms to each speaker, not a lot of increase for the cost of an additional amp since it looks like he already owns the 700.5. IMO, a 2chnl that would do 250 watts RMS x 2 @ 2ohm IS the best way to go for what you want to do, but the PDX 2.150 is not enough amp and neither is using 2 chnls of the 700.5.
The 4.150 would be the same power to each speaker if the parallel/series 2.6 config was used using only 2 chnls and IMO, 150 watts to each speaker @ 4 ohm is too much for the DB's.