With Axiom's original sub line up (EP125, EP175, EP350) they simply didn't compete against the Hsu and SVS brands. From nearly all accounts, the Hsu and SVS models could out perform the Axiom subs at the same or lower cost. BUT...Axiom has seemingly taken that issue seriously and recently released a couple of monsters. The EP500 and EP600. Still too soon to say, but these bad boys are not looking to catch up to Hsu and SVS, but blow them away. Time will tell, they were just released recently. (I know I want one, and I'm a die hard Hsu supporter!)