The specs on the 350 are not totally updated as Axiom has not completed lab test in an anechoic chamber on the new sub. This new sub has a Dynamic power supply which the older model did not. In Alans blind testing the new 350 did almost as good as the 500, and beat the other two 3 letter brands. \:\)

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