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Grace Design m900 Desktop DAC Headphone Amplifier

2-ch Headphone Amplifier with Stereo Unbalanced Analog Outputs, Digital Input via USB, TOSlink, and S/PDIF Coax, and Support for 44.1kHz-384kHz PCM and 64X-256X DSD Audio - macOS/Windows
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Item ID: M900
Grace Design m900 Desktop DAC Headphone Amplifier
Grace Design m900 Desktop DAC Headphone Amplifier

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m900 Desktop DAC Headphone Amplifier with Audeze MM-500 Open-back Headphones

HD 800 S Open-back Audiophile Headphones and Grace Design m900 Desktop DAC/Amp Bundle
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Product Image - This Item - Grace Design m900 Desktop DAC Headphone Amplifier
Grace Design m900 Desktop DAC Headphone Amplifier
$727.00
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Link to Sennheiser HD 800 S Open-back Audiophile and Reference Headphones
$1,999.95
+
Link to Audeze MM-500 Open-back Headphones
$1,699.00
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A Portable Headphone Amp with Impeccable Sound

Grace Design's m900 takes the stunning detail and flawless imaging of their flagship m920 headphone amplifier and packs it into a portable, bus-powered unit. But just because the m900 is portable, doesn't mean it's lacking. Experience jitter-free computer audio playback, with support for up to 32-bit/384kHz PCM and 256x DSD. Dual zero-ohm output impedance headphone outputs deliver spacious and transparent performance, while stereo unbalanced analog outputs make connecting to your stereo monitor system easy. Either way, four different DAC filter settings provide personalized playback. At Sweetwater, we appreciate the m900's simple setup menu and easy-to-read 7-segment LED display, and its large rotary encoder makes volume control and menu navigation a breeze.

Related Videos: m900 Desktop DAC Headphone Amplifier

Grace Design M900 Features:

  • 2-ch headphone amplifier and top-shelf D/A converter
  • Portable bus-powered unit is ideal for travel, desktop, or studio
  • Jitter-free computer audio playback with support for up to 32-bit/384kHz PCM and 256x DSD
  • Dual zero-ohm output impedance headphone outputs deliver spacious and transparent performance
  • Stereo unbalanced analog outputs make connecting to your stereo monitor system easy
  • Compatible with a wide variety of digital sources via USB, TOSlink, and S/PDIF coax
  • 4 different DAC filter settings provide personalized playback
  • Simple setup menu and easy-to-read 7-segment LED display
  • Large rotary encoder for easy volume control and menu navigation

Resources

Why Everyone Should Own High-end Headphones
Feb 25, 2026

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
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2 Year Total Confidence Coverage
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Tech Specs

  • Type: Headphone Amp & DA Converter
  • Input Channels: Stereo
  • Output Channels: 2
  • Analog Outputs: 2 x RCA (stereo)
  • Headphones: 2 x 1/4" TRS
  • Digital Inputs: 1 x Coax (S/PDIF), 1 x Optical Toslink
  • USB: 1 x Micro-B (high power), 1 x Micro-B (data, bus power)
  • Form Factor: Portable
  • Power Supply: USB bus powered
  • Height: 1.8"
  • Width: 4"
  • Depth: 5.25"
  • Manufacturer Part Number: M900

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Reviews

4.5

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if u r looking for good sound & good sound only, this is it
looking for an upgrade to do my project on headphones, mixing mainly...found this perfect match! potable, programmable & superb sound quality!! my first piece of grace design gear, & i think many more to come...big thanks to the folks at Grace for their dedication in making great gears!
by heichiu from hong kong on
Music background: musical director, producer
Great headphone amp
Small footprint with professional audio quality and features!
by Sweetwater Customer on
Brings my music to another level!
Purchased this unit for it's ability to decode DSD files. If you have never listened to a DSD file you don't know what you are missing. Grace design did a top notch job with this DAC. Solid construction, great piece of hardware. Brings my music to life.
by Eddie from NC on
Incredible Clarity
Don't usually write reviews, have two dacs this and the adi-2 pro fs. Mostly using Senneheiser HD600s with a blue dragon cable. The headphone amplifier on this unit is next level for this price, 0.08 ohms output impedance........cmon. Dimensionality, channel separation, very stable clocking...this thing is incredible as a monitor controller or for playback. highly recommended.
by Nicolas Abreu on
Music background: Musician, Producer, Engineer
Elegant and sublime
This DAC is very neutral and incredibly clean but never sterile or 'laboratory' sounding. Far from it. It's a musical piece of gear and a pleasure to listen to. It has an almost silky character and is very non-fatiguing to the ear.

When I first listened to it, the neutral quality of it took me aback some because I realized the admittedly less than stellar DAC I was using emphasized the low mids and was making my recordings sound more rich or full than they actually were. That's really good info to have. The m900 is going to be really helpful for on-location recordings, no doubt.

It's an honest sounding DAC but not in a brutal sort of way. Everything it does is elegant and sublime.
by Jamie from Michigan on
Music background: Professional classical musican who also does on-location recordings.
See also: Home Headphone Amps and DACs, Grace Design, Grace Design Home Headphone Amps & DACs