Bought a jvc deck with 200w total power and installed 4 jvc 230w 6.5 inch speakers in the doors of a 2002 rav 4. Speakers sound like crap after I turn the volume up to about 17 and the deck goes to 50. Sounds like a lot of distortion and sometimes it sounds like some speakers have a lot more bass than others. Not sure of the problem. Please help