The 500 will play a little lower, and has a bigger amp, however the 350s are dang good amps. The more subs you have spread out in the room, the flatter frequency response you can achieve if you have multiple seating locations for movies...


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85