The Kenwood KSC-SW11 is a compact powered subwoofer featuring an aluminum enclosure and an 8-1/4 x 5-1/8 low-profile driver driven by a built-in amplifier rated 75 watts RMS and 150 watts peak. It provides RCA preamp and speaker-level inputs, a wired remote for level control, variable low-pass crossover 50-125 Hz and selectable phase 0 or 180 degrees, with compact dimensions suited to underseat or tight-space installations.