32x48 Pre-Amp Audio DSP Matrix, 32x Stereo + 32x Coax, 16x Opitical Digital Inputs, 48x Stereo/Digital Coax Outputs, 18x 12v Triggers, 2x Doorbell/Pager, 5 Band EQ, Adjustable Gain, Zonal Sub Woofers, Lip Sync Delay, Stereo to Mono Downmix, RS232/IP Control