Peavey 24FX 24-Channel Mixer with USB, MP3, and Built-in DSP 20 "Silencer(tm) Mic Pre" XLR inputs 2 stereo channels with dual mic/line inputs Dual DSP engine with digital effects and output processing including Feedback Ferret(r), 27-band GEQ/5-band PEQ, delay and limiter USB "A" connection to record directly to or playback from memory stick. USB "B" connection for digital audio output and input . 3-band EQ with sweepable mid-frequency and fixed low cut filters Legendary Peavey reliability