Quote:
Originally Posted by mattyjman
while i don't disagree with this, I want to clarify that it's not a "one size fits all" type solution. some HU's don't do a damned thing to the signal, so there is no benefit, none, to upgrading the HU for sound quality if you plan on using an amp.
it's better to check and see what's happening at the factory deck before making an assumption that "all" factory HU's do this...
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While I never said "all"....most, even high end factory systems, do.
As I said, I had the factory deck with the sub thump stealth system that added a five channel amp in place of the stock amp...dramatic improvement to the stock BA system (which the OP does not have)...but the hu still limited bass response at high volume...I went with my Pioneer unit because I wanted in-dash nav, and the bass response across the entire volume spectrum was improved. So I'm not speculating...the difference was obvious at moderate volume levels...
JL audio makes a signal processor specifically to deal with the built in processing of factory head units.
http://www.crutchfield.com/App/Mobil...essors&tp=6870
I wouldn't recommend a change in the hu unless there was an advantage to be had. The OP said he was interested in bass response. If he changes everything else as he already planned the only limiting factor to bass response at high volume will be the hu...
Also, take a look at what comes out of the back of the stock hu and runs to the amp...these are speaker-level wires, not RCAs going to the BA amp. I'd like the experts at sub thump to chime in...when I look at the adapter they sell for the BA system, it looks like a line-level to RCA adapter.