I have 2 Memphis 2500 for the subs and 2 Memphis 500 for the doors.
this is the 2500-4000
http://www.memphiscaraudio.com/products/amplifiers/the-mojo-mclass-amplifiers/
i didnt see my door speaker amp on the site. But both sets of amps look identical.
As far as the battery goes i have 3 batteries total and a high output alt.
and how many door speakers are you running and are they Memphis Audio as well?