Technical Specs STUDIO MASTER AiR 4U : 

Number of Inputs 4 Mic / 8 Line +1 CD In + 1 Media Player
Nominal Input Level AUX In (-20dB), Effect (-10dB), Line (-40dBm), MIC (-60dBm), Tape In (-10dB)
Frequency Response 20Hz-20kHz ±3dB
THD (1kHz) <0.03%
Signal to Noise Ratio -85dB
Clip indication 4 dB prior to true clip
Equalisation (Treble/Mid/Bass) ±15dB @ 12kHz / 2.5kHz / 80Hz
EFX Delay with repeat
Dimensions (W x D x H) mm 245 x 245 x 70
Net Weight (Kg) 2.24