Seven equalization bands (50Hz, 125Hz, 315Hz, 750Hz, 2.2 kHz, 6kHz, and 12kHz), each frequency is adjustable from -12 to + 12dB (-18 to +18dB for subwoofer frequencies) ^^ Subwoofer output uses a built-in 35-250Hz ^^ Three stereo RCA outputs to drive front, rear, and subwoofer audio amplifiers ^^ An auxiliary stereo RCA input for use with portable devices, such as an MP3 Player or DVD player ^^ Separate controls for master volume, subwoofer volume (sub level), front/rear fader, and selection of main or auxiliary inputs