4 channel high-performance PureDrive™ mic preamps 
+48V phantom power, polarity invert and 3rd order hi-pass filter
Stepped Gain control up to +65 dB Gain 
31-step Trim control, with precise 1 dB increments – overdrive the signal with the Gain control and then reduce to a suitable level using Trim. 
3 modes for each preamp – Clean, Classic Drive and Asymmetric Drive 
Mic/Line Input Switching 
Mic via XLR  
Line via choice of TRS Jack or dedicated D-Sub connectivity 
4 x front panel Hi-Z/DI Instrument unbalanced inputs with automatic input detection 
4 mic preamp input impedance options – explore new tonal possibilities from your dynamic and ribbon microphones
Balanced analogue outputs/insert sends for external processing 
+24 dBu professional line level insert returns/ADC inputs 
Analogue to digital connectivity via ADAT, AES and USB
Ability to switch ADAT and AES connections to source audio from DAW outputs (USB) instead of the A/D converter 
USB soundcard mode : QUAD – 12 in / 12 out (@44.1/48 kHz) ; 4 x analogue + 8 x ADAT in (via Link in) / 4 AES + 8 ADAT outs
Stepped pots and digitally controlled analogue electronics for precision, stereo matching and ease of recall 
Up to 192 kHz and 32-bit conversion, professional I/O levels (+24 dBu = 0 dBFS). 
Selectable Auto-Sleep mode 
Auto-ranging Wordclock In and Out