Metrum Acoustics Onyx R2R NOS DAC, FS/FT for DAC w/ tubes and output transformers

Looking to sell a great condition Metrum Onyx DAC. This is an R2R NOS architecture using four of Metrum's FPGA-driven Transient DAC2 modules (same as what's used in the much pricier Pavane DAC). It's balanced, and also MQA-ready. Terrific sound quality and incredibly similar to my PS Audio DIrectStream Junior, but I'm really curious about tubed units with transformer coupled outputs.

Asking $1,800 plus split PayPal fees and insured shipping, but accepting offers. Shipping to US and Canada only in original factory boxing. Any questions, please ask.

As mentioned earlier, I'm very interested in trading for the right tubed DAC, and will add funds if needed. Primarily looking at Modwright Elyse, Audio Note 3.1, 3.1x, 4.1, 4.1x, or an EAR DACute 192. Really looking for something with tubes and transformer coupled outputs.

From Metrum:
Weight 3.2 kg
Dimensions N/A
Voltage & Color
110V Silver Line USB, 110V Black Line USB, 230V Silver Line USB, 230V Black Line USB, 110V Silver Line I2S, 110V Black Line I2S, 230V Silver Line I2S, 230V Black Line I2S

Specifications
Balanced Digital to Analog Converter

24 Bits Non Oversampling

Forward (FPGA) corrected

2 DAC'S per channel in differential mode

15 VA toroidal transformer

110/115V AC 220/230V AC 60/50Hz

Input 1x optical, 1x coaxial 1x BNC and USB

Output 1x RCA Stereo Pair Single ended 2Volt RMS

Output 1 x stereo pair XLR: 4 Volt RMS

Frequency Response 44.1 kHz sampling 1Hz – 20 khz -1 dB

Frequency Response 192 kHz sampling 1Hz – 65 kHz – 1 dB 192 and 384kHz (USB)

Distortion 0.006 % THD

Noise Floor -145 dB related to 2 Volt RMS

Output impedance RCA 100 Ohm, XLR 100 Ohm

Sampling rate Optical 44.1 – 96 kHz

Sampling rate Coax and AES/EBU: 44.1 -192 kHz

Sampling rate USB 44.1 – 384kHz

Dimensions 290 x 250 x 60 mm

Weight 3.1KG