My my setup is

Alpine CDA 9856
Alpine ERA G320 sound field processor
Alpine MRV F450 4 channel amp
JL Audio component speakers 5.25 (4 in total)
Alpine MRP 650 mono amp
Alpine SWR-1242D 12 Sub (sealed box)

Can someone point me to some refrence threads?
This isnt my first setup but its been the most difficult. My old head unit (Alpine CDA 7949) had 4v preouts these newer Alpine head units have 2v. I think this may be some of the problem. Its just impossible for me to get good clean bass let alone for it to hit hard.

What ranges should I use for HZ, Bass EQ, Gain?

The Amps specs are 600w RMS@ 2ohms
The subs Specs are 500w RMS@ 2ohms

Sub PDF http://support.alpine-usa.com/produ...M_SWR-1242D.PDF

Amp PDF http://support.alpine-usa.com/produ...%20MRP-M650.PDF

Sound Field Processor PDFhttp://vault.alpine-usa.com/product...OM_ERA-G320.PDF

 

go to your local Stereo and Sound store, and brainstorm with an installer, or maybe even the Manager.