Grace Design m900
Desktop headphone amplifier / DAC / preamp
Headphone Amp / Distribution$727Manufacturer list price
Specifications
- Type
- Headphone Amp / Distribution
- Description
- Desktop headphone amplifier / DAC / preamp
- Signal path
- Digital (recallable / digitally controlled)
- Channels
- 2
- Channel format
- stereo
- Form factor
- desktop
- Connection
- USB, S/PDIF, TOSLINK
- Sample rate (kHz)
- up to 384 (USB PCM, or DSD256 via DoP); up to 192 (S/PDIF); up to 96 (TOSLINK)
- Bit depth
- 32
- Powered
- true
- Impedance (Ω)
- 0 (headphone output impedance)
- Country of manufacture
- USA (Lyons, Colorado)
Details
Controls: large rotary encoder (volume/menu navigation), 7-segment LED display
I/O: Digital in: USB (async), S/PDIF, TOSLINK. Analog out: unbalanced RCA level-controlled monitor output. Dual zero-ohm-output-impedance headphone outputs.
Notes: FLAG (multi-function): Grace Design lists the m900 under its 'Monitor Controllers' nav category and markets it as a 'headphone amp/DAC', combining headphone amplification, a stereo DAC, and a basic level-controlled RCA monitor output. Classified here as Headphone Amp / Distribution per field guidance (primary use case is headphone monitoring) rather than Monitor Controller; this is a judgment call. DAC: AKM AK4490, 32-bit. Headphone output power: 600mW@32ohm (Low/USB-bus-power mode), 1020mW@32ohm (High/AC-adapter mode). Power: 2.5W max (USB bus) or 8.0W max (AC adapter). Dims 4x5.25x1.8in. Price $727 per Sweetwater (July 2026); an older review cited $660, suggesting a price increase over time.