What would be a good 1200 watt rms mono?

dude, first of all if you have 2 4ohm dual voice coil woofers they wouldn't wire it down to 2 Ohm level, is going to be one ohm level. Unless you have 2 of the 2 Ohm dual voice coil woofers than you wire parallel wire it at one ohm or brigade wire it at 2 Ohm level. the cheapest amplifier you can get for those subs is either going to be a Hifonics or MB quart the powers load sucks but for quality wise can't want wrong, just don't mount on your woofer box otherwise is not going to be last any longer than 3 weeks. My personal like the http://www.audioque.com/aq/?page_id=26 wire it at one ohm load. for both of the price and quality can't beat it. over kills hifonics and MB quart. Also Rockford T1s aren't that good, T2's are okay. I would suggest you looking into the Fi audio SSD series those subs are pretty much have the same power outputs as the new model of T1's at 800 RMS but for the SPL are way louder than T1's.

inventory alternator and battery you wont see 900 rms @two ohm from the ones amps ..... your voltage might be too low... (big3 improve and larger battery might support ) both method the ones subs cant relatively manage a thousand real rms wattage .... however six hundred-800 might be greater than ample and will probably be lovely rattling loud disorders will come should you desire to do two of each and every set americaconsidering then youll definitly want a few enhancements electric shrewd .... (alternator )