The answer to this question is always.....yes you need a sub. The single most important speaker is the sub. There are some exceptions which are high end very $$$ two channel scenarios but 99.5% of the time...you need a sub.

PS. I have M80's. Guess what, they need a sub.

Start saving smile

2xAA
M80/VP150/VP160/QS8
4xM3/M22OW/M2OW/VP150OW/4xM3IC/4xM3OW
EP500/800/HSU VTF3/SVS PB2k/SB2k/SB-12