Thanks for all input!!! you all got back to me before Memphis did!!! here is there responce!!
We would recommend a much lower gain setting and a much lower LPF setting for your MCD1500. Try to keep the gain down below halfway if possible, and set the LPF to 80hz or less. If your enclosure is ported, turn on the subsonic filter around the tuning frequency underneath the box.
The "average" current draw can only be determined whenever you use the amp. Audio is so dynamic that you only really demand heavy current from the amp on peaks. If your listening habits are more towards a medium to upper volume level on average, you may draw from 50 to 100 amps. Be aware that the fuse values that equal 150 amps may be temporarily exceeded on heavy bass peaks (up to 200 amps) but it most likely will not be too much to blow the fuses since it happens so quickly.
Thanks for your questions- Memphis Car Audio Tech Support """""""second question was if 106 alternator and yellow top Optima would work.""""""""""
Actually, a 106 amp alternator is a bit on the light duty side. It would be great to upgrade to 150-200 amps at idle. Or you can purchase multiple 1 farad capacitors (1CBFMT) from our line that should help out. The main concept you want to establish is that your battery voltage isn't dipping down to 12 volts or lower. You want to keep it as high as possible and if what you're currently running accomplishes that, you're fine.