Selling Zen Quadro. Used, but with none to minor visual signs of use. Great stuff for the money.

Manufacturer description:

• Class-leading AD/DA conversion with up to 130dB of headroom.

• Recording, mixing and playback at up to 24-bit/192kHz.

• Proprietary 64-bit AFC™ (Acoustically Focused Clocking) technology & Jitter Management algorithm delivering increased sound width, separation, and detail.

Connectivity

• 4 × Discrete 6-transistor preamps with 75dB of gain for pristine recordings. All work as microphone/line and two are also Hi-Z inputs, on combo XLR jacks, and supply 48V of phantom power.

• 2 x monitor outs and 2 x line outputs via TRS

• Two stereo headphone outputs with separate gain control and mix

• Two independent USB-C ports (OTG) for simultaneous playback & recording

• ADAT Input (up to 8 ch) and S/PDIF I/O (2 ch)

• DC-coupled inputs and outputs for controlling modular synths with control voltage (CV)

Real-Time Effects Processing

• Included collection of 37 Synergy Core effects modeled after classic and rare analog outboard gear.

• Synergy Core – proprietary FPGA+DSP platform for real-time effects processing allows up to 48 effects loaded simultaneously with near-zero latency.

• Mic Modeling Engine allows pairing with the Edge microphones for real-time use of vintage microphone emulations.