googled imax sound systems and found this "In 1988, Imax acquired Sonics Associates Inc. as an affiliate. Alabama based Sonics is a world leader in sound system design and offers customers the benefits of more than 26 years of research and hands-on experience in the IMAX theatre network." found one other article that linked imax and bryston but there was no mention of a 7b. im starting to believe this is a 7b is it a st.