Next on the list for my new configuration is the 3sixty.2 Fosgate signal processor. It will replace all those knob boxes I have in the back. Fully programmable and will clean up any signals and boost to 6.6volts as well. It's kind of expensive but it's worth it for all that it does. Programmable by bluetooth trea 650. So I can use my phone to tune it.
http://www.rockfordfosgate.com/products/pr...es.asp?cat_id=1