Been running the RAA4200 since these amps came out. Very durable and sound quality is excellent. Believe these were engineered before MB Quart was bought by maxxsonics and made by Rockford Fosgate. Guessing this amp does closer to 500w X 2 @ 2ohms as they are under rated and the amp gut pics online are impressive. I'd buy it if I had the room...this amp is pretty big with a very heavy duty chassis. bump. good luck with your sell.
"The Universe is shaped exactly like the Earth if you go straight long enough you end up where you were." Modest Mouse