Use a single channel(mono block) amp. Make sure its 1 ohm stable and the RMS power rating is as close to the power range(RMS, continous power that the sub can recieve) of both subs together. Id say at least an amp that puts out about 1200w RMS at a 1 ohm load. Look at the RMS rating of an amp and never the max. Wire the subs in parallel which means positive to postive and negative to negative. This lowers the resistance which means you get more power from your amp. Also, for any systems thats draws 1000w+, i would upgrade you alternator to a High Ouptut one. A good deep cycle battery and at least 2ga power wire. Good Luck!
