good hf amp?

i am using a kenwood amp kac-7251 which is 150watts x2. got it for almost nothing but am regretting it pretty badly. have a pair of mbquart 6.5RCEs and the amp is clipping. could my grounding be causing this in any way or power? i have a good 14 volts going to the going to the sytem at all times. if none of these are the case, which i doubt they are, kenwood makes crap. what amps should i look into. i am on a bit of a budget. also, how are the pce's compared to the rce's, quality and sound level? i heard the rce's hooked up to a diamond amp and i still wasnt too impressed.

Clipping typically caused by improper gain setting.  How did you set it?Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

very low, i have 6.5 volt preouts on my deck so i can crank the deck without any distortion so i have no need to turn up the gain.

Just wondering if you get the clipping when the HU volume is not any higher than the 3/4 point.  Even with a high pre-out voltage, a head unit can and most likely will send distortion to the amp, if cranked to the max.  I would just check output voltage to the speakers with a DMM first before trashing the amp.  And keep the deck at no higher than 3/4 volume. Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.