I just got some new MMC6500's installed in my Toyota Camry. These are replacing the EX3560's I lost in an accident. The highs in these new speakers are incredible - clearer than anything I've ever heard, and I understand lyrics that sounded garbled before. I am very happy with this aspect of the speaker.
However, the mids seem overly subdued. The grunt from rock guitar riffs no longer jumps out at me, it takes a back seat to vocals, highs, and bass. Think of Enter Sandman. The guitar should be on the front stage, instead the bass and the highs are.
I've tried adjusting my head unit's EQ but haven't been able to get the results I'm looking for. On my old EX speakers, I just left it on TONE BYPASS and it sounded great. No other aspects of my system have changed. My only suspicion is maybe the crossovers didn't get connected or set correctly. My speakers were professionally installed at Tweeter though. These new speakers are the only new part of my system. Everything else is the exact same it was with my EX speakers.
Rockford Fosgate Punch 300X (37.5 watts RMS for 4 channels @ 4 ohms)
Avionixx 800.2 powering my two Elemental Designs 12" subs in a sealed box