Professional, rack-mountable mixer with 4 MIDI, 4 phono, 4 line, 4 aux, two 6.3mm mic inputs plus one XLR mic input and a built-in 4x4 Sound Card that allows DJs to play and mix music from their favourite computer software, but still have the hands-on hardware control from a compact mixer. Plus, with a built-in Sound Card DJs can start mixing right away without having to purchase extra equipment. All the features found on the unit were intuitively designed for the most experience DJs by fellow DJs and include Master (XLR and RCA) and Booth (RCA) connectors, MIDI input to control “MIDI Learn” software, 4-in/4-out USB audio interface plus MIDI interface, and long-life optical fader (crossfader) with independent curve for channels 1 & 2 (short to long curve) with reverse button. This crossfader was factory tested for over 1 million crossfades back-and-forth and never quit working. Other features include 4-band rotary EQ with push kills, talkover button (-15dB), and DJ mic channel with Volume plus 4-Band EQ (Treble, Bass, Gain & Mid). Sampling rate: 48 kHz. A/D and D/A converter: 24 bit. Frequency response: line - 10-20 kHz +/1 dB, phone: 50-20 kHz +/1 dB, mic: 10-20 kHz +/1 dB. THD: <0.05%. Dimensions: 428 x 178 x 85 mm. Weight: 4.475 kg.