" Acoustic suspension - system use the trapped air to control and damp the speaker movement like shocks on a carbr Compact size - Only 112 cube yet has more output thanany 8 subwoofer weve ever madebr PWM Amplifier - a really smart efficient power plant design is crazy efficient up to 80 so you get to rock out and stay green at the same timebr DSP - The DSP controls the equalization compressor low pass and high pass filter functionsbr High-pass crossover on speaker level input lets stereo users enjoy bass management which reduces distortion and belnds sub and monitors better br NHT Super 8 110-Watt Powered Subwoofer (Gloss Black Single)"