Has anyone heard of Audio Art amps. I had a 400.2 amp pushing 2 6x9s and 2 5x7s. Sounded great except i dont know what the wiring diagram was. Ive never heard a rack sound so good. Im just wondering if this is a decent amp or not. Im pretty sure it was running at 4 ohms. Max rating is 800watts. This is an older amp made in the usa. Any body have any experience with them? Thanks