EVE audio TS108, Active Subwoofer, Frequency range (-3 dB): 33 - 300 Hz, Woofer: 195 mm / 8"", Max. SPL @ 1m: 105 dB, Max. Output power (interm.): 150 W, Passive radiator instead of bass reflex port, No disturbing flow noise by air turbulence, Limiter, Controls for volume (Satellite & Sub): -inf, - +6 dB,