i dunno, there are people on here (v8s10) that run 2000 watts to each 15" (or 12"?) L7 daily.. there are some people that say dont go over RMS. In my expirience ide say a 12" can handle 1000 watts safely... I think your fine running 1400 watts to them, even ported. Just set gains right, and dont be stupid with volume.. I've seen a lot of mixed opinions about the L7's power handling, and I think its really up to you and what you feel safe doing...