The C-101SA-6-Ported is a 10" side ported in wall subwoofer combined with a high output 10" (254mm) honeycomb aluminum woofer and an all new band pass cabinet design, the 101SA-6 has an impressive 89dB sensitivity with bass down to below 33Hz. When combined with our M1000 DSP amplifier, this unit delivers over 350W of pure subsonic audio performance.