4 yr.old (2 original owner/ 2 me) lightly used Singxer SU-1 with main pcb board & internal linear power supply modifications performed by AS- @Energy& @Quadman which includes low ESR upgraded caps, LT3045 voltage regulators, new crystal oscillators from ar-t, new diode bridge.

Includes power cord, 0.5m Apollo I2S/ HDMI cable, & DC conversion power adapter for external LPS: https://www.ghentaudio.com/part/dc99.html (not attached as I was happy w/ internal LPS mods). I can send pm or email .pdf manual & other pertinent data to buyer at time of sale.

Price:  $275 includes Paypal & shipping fees (double-boxed & insured).  Continental US only.

https://shenzhenaudio.com/products/singxer-su-1-usb-digital-interface-with-xmos-xu208-cpld-dsd512-dop

https://www.kitsunehifi.com/product/kte-su-1-kitsune-tuned-edition-3-2uv-output-noise-125db-psrr-usb-digital-to-digital-convertor-xmos-xu208-cpld-dsd256-dop-free-shipping-with-coupon-code-singxer/