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Grace Design m900 - Desktop DAC Headphone Amplifier Demo

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 - Mac/PC
10 Write review Item ID: M900d1

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$594.00
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Condition Notes:

This item is in like-new condition and is in perfect working order. Some of the original accessories are missing, including the 2x USB-micro cables. They have been replaced with USB-micro cables. This item ships in its original factory packaging.

This item was thoroughly inspected by our factory-authorized service team and is backed by Sweetwater's exclusive 2-year warranty. The images shown do not necessarily represent the condition of this particular item.

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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

What is Demo Gear?

At Sweetwater, we're so picky that what we call a "demo" is actually better than what most music retailers sell as "new" gear! Our gear hasn't endured hundreds of people a week plunking away at all the keyboards, fumbling through Stairway to Heaven on every guitar or playing with every fader and knob on a mixer or control surface.

What demo means to us is that we've had it out of the box, or maybe it was in a customer's hands for a few days and isn't "factory fresh" as a result. Every demo item we sell has Sweetwater's 2-year Total Confidence Coverage™ warranty, and has been tested and verified up to "new" specs by our factory-authorized technicians to make sure it's in perfect working order before we ship it to you.

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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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Customer Reviews

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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.

World Class

I have tried dozens of high end dacs and headphone amps for mixing and audiophile listening, and this one is top 5 for sure, with exceptional features.

If you need a portable mixing rig for flights, or even just an insanely clear headphone amp for your computer...this thing beats out a majority of what's on this site.
by Sweetwater Customer from Washington D.C. on
Music background: Mixing Engineer
See also: Home Headphone Amps and DACs, Grace Design, Grace Design Home Headphone Amps & DACs
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