Hi guys I have 3 different rockford fosgate subs. 1 10" Rockford fosgate power hx2 1000 watts rms , 1 10" rf punch 400 watts max, and 1 10" rf punch 400 watts max 2. Some guy at the audio store told me that if I were to put them together that they would be off beat and cancel out each other. I never heard of anything like this. I have got another question. I am gonna be making my own sub enclosure. What type of enclosure would be best for hard hitting bass? Should I make the 2 10 inch rf 400 watt subs in a sealed enclosure, and the monster hx2 in a bandpass enclosure? Thanks, Chris