It's working, but very quiet... using stock head unit, isn't it supposed to be kinda loud? The fronts overpower it pretty well, any diagnostics?

i read all the threads but didn't find anything pertaining to this specific issue

 

When mine started sounding weird, it was the stock head unit on the way out.

 

and i just need a regular head unit, wiring harness, antenna adapter and a line leveler to change that out right?

 

There's a harness that allows the new HU to power the BOSE stuff....it actually DEcreases the signal. It cost me 60 bucks at my local installer, but I'll bet you can find one cheaper online.

Google "BOSE Mazda adapter" heh, nevermind...here ya go.

http://www.crutchfield.com/S-Y5BHBrG...A02&tab=review