2006 Jeep Wrangler with factory 6" subwoofer in console. I modified the front 4x6" dash mounts to accept Infinity Kappa 52.9i; installed the same Kappas in the rear overhead soundbar. With the factory receiver, in my opinion the overall sound got worse. I double checked the wiring diagrams: all the correct + and - hookups were made to the Infinity external crossovers. I tried changing the tweeter attenuation buttons on them; no real help. They sound BAD.
So I added an Alpine iDA-x305 receiver, rated at 18W per channel. The new receiver is exactly as (un)tuneable as the factory deck: settings for "bass" and "treble" only. No EQ. Not only does it sound no better, but my factory console subwoofer now only works with the radio but not with the iPod. I'm totally confused how that's even possible.
How can an Alpine receiver and four Infinity Kappas sound like crap?!? What am I missing here?