This is our first custom-design circuit-board product. It converts USB to I2S, the native DAC chip interface. The I2S outperforms the Off-Ramp Turbo, and it is no slouch. You must have either a Perpetual Tech P-3A DAC or a Northstar 192 to use it. The I2S interface eliminates all of the jitter created by S/PDIF. Lowest jitter solution that we have heard.
Please see the website for more details.
Also, we have plans and are actively designing an I2S solution for the Benchmark DAC-1. This should be available in about 2 months. We have a new DAC-1 to model the change already and many of the parts. The Off-Ramp I2S/DAC-1 combo should safely outperform practically everything on the market.
Steve N.