For sale is my RME ADI-2 PRO Reference AD/DA Converter (original non-“FS” version). I used this converter primarily for a hifi setup with a pair of Unity Audio Rock monitors, but one my my monitors now needs to be repaired, so my loss is your gain. I don’t know all of the differences between this version and the “FS” version that was released shortly after. There’s lots of discussions on discussion boards online that measure differences between units (this version was very highly rated when purchased). Description: RME’s reference AD/DA converter is a host of devices all put together into one unit, with a simple and mostly automated way of using it right out of the box. A unit with the industry’s biggest footprint per feature ratio, excellent tech specs, crystal clear and transparent sound signature, and two extremely powerful headphone outputs. RME's reference AD/DA converter is: * A high-end AD/DA converter in professional studio quality * A double headphone amplifier in true high-end quality * A USB DAC like no other - the most versatile and capable one * A high-end AD/DA frontend and headphone amp for iPad / iPhone * A multi-format converter (AES, SPDIF, ADAT) with monitoring function * A DSD record and playback solution * An AD/DA frontend for audio measurement at up to 768 kHz sample rate As the most flexible converter available, the ADI-2 Pro offers balanced/unbalanced analog I/Os, double Extreme Power headphone outputs, SteadyClock III, 4-stage hardware input and output level control, DSP-based signal processing, external power supply operation, Class Compliant USB compatibility, sample rates up to 768 kHz as well as DSD record and Direct DSD playback (256 / 11.2 MHz). Connectivity * 2 Ch. Analog In / 4 Ch. Analog Out * XLR (Bal.) and TS (unbal.) outputs * ADAT or SPDIF I/O optical * AES/EBU and SPDIF coaxial * 2 Extreme Power Headphone Outputs * USB 2.0 Thanks for looking!