mmm if each sub has dual 4 ohm coils, you'll have two 2 ohm subs. You'll either want a two-channel amp, or two mono amps, or a single mono amp if it's 1 ohm stable. More amps today are being listed as 1 ohm stable, so that's worth a look. Kicker, JBL, Orion, PG, and plenty of others come to mind.