i have the 4000d BAMF.
i think its a great amp for the price. not everybody can buy the best. but its ok.
check out my videos of the amp in action. 2 MA1500XL powered by 4000d
http://www.youtube.com/m4st3rowner
i have pioneer 4900. i tried everything. moved rca on opisite side of power wire. moved amp 20 times. moved ground wire to amp to chas under car. tried bolting ground wire to frame and running to headunit.
nothing worked. the sound just drove me crazy. when your idle its at its loudest. i just...