Viridian,
My memory is always failing me. I think the Sigma was a sealed enclosure, I heard it at a shop called HI C audio in Leesburg Va. back in the early 80's. I thought it sounded very nice even without the omega sub, ended up buying the original epsilon which was a updated version of the sigma/omega combo in a single 3 way speaker which reminded you of a Vandersteen in appearence. Take care!
Jim
My memory is always failing me. I think the Sigma was a sealed enclosure, I heard it at a shop called HI C audio in Leesburg Va. back in the early 80's. I thought it sounded very nice even without the omega sub, ended up buying the original epsilon which was a updated version of the sigma/omega combo in a single 3 way speaker which reminded you of a Vandersteen in appearence. Take care!
Jim