hey, ive got a 400 watt Jensing amp, and a cheap 250 watt roadshit amp, ive got 2 RF 12 inch subs, that used to be hooked up to the jensing amp, but all of a sudden the jensing started occelating or "motorboating" so i had to hook up my subs to the POS amp, ive lost alot of power because of this, if anyone knows how i can eliminate the occilation so i can hook my subs back up to the good 400 watt amp i would really appreciate the help.