First of all, you need to know what kind of speakers you have. Is it 4ohms or 2ohms? Is it DVC or SVC? How will you be wiring them? In parallel or series? Then you can look for amps that meet your requirement. Some are 4ohms/2ohms and 1ohm stable. If you want to bridge them, then look for 2ohms stable at least. 1 ohm stable costs more. Have a budget in mind and then look at Zapco/Orion/PPI/RF/Kicker/JL/JBL/Audiobahn/MTX etc. Don't look at peak power numbers. They are very deceiving.