hey i checked those out and i wanted to ask you some questions. 1st are those dual 4 ohm subs, because i thought you could run those at 2 ohms or 8 ohms. 2nd doing only one sub, i thought that if you are doing dual voice coil only the 2ohm would work in this scenario, or the 4 ohm single. sorry man kind of new to this, just making sure i don't purchase the wrong sub for this am because I'd rather not run the amp @ 2 ohms 600 because I dont even want to screw around with an alternator upgrade or anything like that, because I also plan to throw a 4 channel in there, see my dilemma? man any more input would be greatly appreciated. from your experience a system pulling roughly 760 rms vs. 560 rms do you see many dimming problems with the 760? or am I just being over protective. once again thanks man.