should i bridge hi's and mid's to 2 ohms or leave it at 4 ohms?
i heard that leaving hi's at 4 ohms are better.

 

Usually bridging amps to 2 ohms increases the total harmonic distortion percentage (THD)... Check ure amp stats for this.. but I know my kicker goes from like 0.001%THD at 4 ohms to 0.1%THD at 2 ohms.. Certainly ive always found it sounded much clearer at 4ohms!