i have 2 performance tekniques ICBM5712DX subs. each one is: EFICIENCY=89.58DB RE=3.2OHNS NOMINAL IMP=DUAL 4OHNS RMS=500 PEAK POWER=1000. I want to match em' with a D class mono amp, my question is which amp should i get and how many watts should it produce also how should i wire the subs for a powerfull yet tight bass. low to mild budget. Can please somebody give me some advice. Thank u.