Big speaker sound without the big speaker whether you're looking for your first home theater sub/SAT system or want to upgrade to more performance, you're in for a big surprise in a small, compact package From. The predecessor to Blackstone TL, our RM Series, was always about "big speaker sound without the big speaker. " Blackstone TL represents a significant leap forward, delivering an astonishing home theater performance never before heard in compact loudspeakers.