Do not underestimate the SCC300's ability for HT. I am very happy with my 4.0 cubic feet sealed subwoofer. It is heavily braced with 3/4" Baltic birch braces and BB/MDF 1.5" sandwich for front and back. Integrating with my 1801s was done using a Hypex HS200 which has an active crossover, low-pass and high-pass filters. I bought Jackman's SCC300 with the intent of making stereo subs later this year.
Al