Adding to an ancient thread......
I was tired of the stock clock radio-esque stereo so I decided to upgrade. There are things about each of the actual headunit replacement options that I don't care for so I opted to keep that part of the system and ditch the rest.
Polk MM572 5x7s (x4)
Kenwood Excelon X801-5 (50x4@4ohms + 500x1@2ohms)
JL Audio Stealthbox
WOW! The results are beyond my expectations. Clarity, volume and a full range of frequency response are music to my ears. I am sure that any shortcomings in the overall tone is due to the stock headunit but I think the tradeoffs in the available options and cost aren't worth the minor, to me, gains in performance.
The only non-100% reversible change that I made to the car was that I cut the fender well grommet to run the power wire for the amp. I only used the wiring harness portion of the PAC unit to serve as a place to splice my in/out speaker wires for the amp. No cutting of factory wires or taps were needed.
I know that there are cheaper options than the Stealthbox for a sub but I like the fit and tone so it was worth the premium. It is very musical and tight.
The Polk door/deck speakers themselves made a modest improvement over stock but really came alive once powered by the amp. The Kenwood is a pretty compact unit considering it's output. For the inputs I spliced the factory speaker wire signal via the PAC harness to RCA cable ends to make the RCAs "high level" inputs which trigger the amp to turn on so there is no need for a separate turn on wire from some keyed source. I could have used the PAC converter but wanted to keep things as simple as I could.
That's about it. Very pleased with the results.
Edited by GrabberBlue, 12 August 2017 - 09:56 AM.