Professional 4-channel digital mixing console. 64-bit mixing processor for a warmer, more nuanced sound. Fine tune EQ and fader curves and improved FX controls to give you more creative options. It also has an independent Send/Return, 4 phono inputs and 2 USB ports, allowing you to configure it your way. Number of channels: 4 audio channels, 2 microphone channels. CD/LINE×6 (RCA), PHONO×2 (RCA), DIGITAL IN×4 (COAXIAL), MIC×2 (front panel XLR & 1/4 inch JACK dual ×1, 1/4 inch JACK×1) Outputs : MASTER OUT×2 (RCA×1, XLR×1), BOOTH OUT×1 (1/4 inch JACK), HEADPHONE MONITOR OUT×1 (top panel 1/4 inch), JACK×1, REC OUT×1 ( RCA), DIGITAL OUT×1 (COAXIAL) Other connections: SEND×1 (1/4 inch JACK), RETURN×1 (1/4 inch JACK). MIDI OUT×1 (5-Pin DIN), USB B port×1, LINK port×1 (RJ45) Sampling: 96 kHz. D/A converter: 32-bit. A/D converter: 24-bit. Frequency response: 20 Hz – 20 kHz. Total Distortion Radius: 0.004% or less. Radio Signal/Noise: 107 dB or higher (LINE). Decibel Output: 19 dB