We’ve had this unit for a minute and it has been in our smoke free, pet free, recording studio, and we are only parting with it as we have upgraded from stereo to Atmos. We are really sorry to see it go.
The rack has lived in our machine room and controller in our control room.

On another note, from Grace design on this product has been absolutely superb. There are things not available on the front panel, or on the controller that can be done to augment the signal path, and they have been absolutely fantastic at helping us find solutions that already exist within their product, but are not immediately front facing.

This unit has not been altered in any way from its factory release. The changes mentioned above are toggles and jumpers that are all available to anyone to alter for specific signal/monitoring path.

From the manufacturer:

This is the second generation stereo monitor controller, engineered by Grace Design from the ground up to provide unrivaled sonic purity with a comprehensive and powerful feature set.

The m905 represents a benchmark for audio playback quality. DAC performance is on par with the finest esoteric mastering equipment available. Our redesigned s-Lock™ PLL ensures ultra-low jitter clock regeneration. An asynchronous USB class 2 interface allows the m905 to act as the master clock of the computer’s USB audio buss, effectively eliminating interface induced jitter for computer audio playback. And finally, meticulous analog circuitry measures with outstanding numbers in dynamic range, distortion and noise performance, ensuring bracingly open, detailed and musical playback of any input source.

All main audio and power supply circuitry is housed in a 2U rack mount mainframe, while system control is managed by a sleek, ergonomic remote control unit. This new RCU is a combination of dedicated hardware and a color graphical LCD display. All primary monitoring features are accessed via hardware switches and a rotary encoder, while all system information is presented by the graphic LCD and illuminated switches. This hybrid design allows for the solid feel and function of traditional hardware with the added power and functionality of a graphical user interface.