AFAIK: the amp must be a little bit higher than the subs be careful lang sa gain!!! this is the only way to get the full potential of the subs!!!

in my case:
1012= 400rms *4
DLS Ultimate A6
The dual Mono Amp
RMS output at 13,8V, 20Hz-20kHz, < 0,1% distortion
Mode : AB
Number of channels : 1 ( for subwoofer use )
Nominal power in 4 ohm : 500 W
Nominal power in 2 ohm : 870 W
Nominal power in 1 ohm : 1200 W
Fuse: 4 x 35A (underated this thing can go up to 600w in full!!!)

so overkill nga yung amp diba buti nalang kayang ihandle ng DD ang 600w kahit rated 400w lang sila