Grace Design m920 High Resolution Monitoring System

Grace Design m920 High Resolution Monitoring System

Grace Design m920 High Resolution Monitoring System

B&H # GRM920 MFR # A920
Grace Design m920 High Resolution Monitoring System


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Product Highlights

  • Analog & Digital Inputs
  • Balanced & Unbalanced Inputs & Outputs
  • D/A Conversion up to 32-bit/384 kHz
  • Supports DSD 128 Playback
  • S/PDIF, AES, TOSLink, USB Digital Inputs
  • 2x Front-Panel 1/4" Headphone Jacks
  • 0.05dB Level Control Adjustments
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  • 1Description

The m920 High Resolution Monitoring System from Grace Designs is a monitor control system designed to provide highly accurate monitoring to your speakers via either analog or digital sources. It features an integrated digital to analog converter capable of handling PCM resolutions up to 32-bit/384 kHz as well as DSD 128 files. The unit provides a variety of digital input options, including AES, S/PDIF, TOSLink, and USB inputs. The m920 also provides both balanced analog XLR inputs.

For accurate playback, the m920's output is adjustable in 0.05dB steps. The unit also supports a variety of outputs, including 2 stereo sets of unbalanced RCA outs, 2 balanced 1/4" outputs, and 2 front-panel 1/4" headphone outputs with volume control independent of your main outs.

Stereo analog inputs - balanced (+4dBu) XLR and unbalanced (-10dBv) RCA.
Ultra low distortion 32-bit /384 kHz Sabre DAC accepts stereo digital input sources in AES3, S/PDIF, TOSLINK (optical) and USB formats with auto sample rate detection and digital de-emphasis filter
User configurable DAC filter response for PCM and DSD playback
USB for playback of up to 384 kHz / 32-bit PCM as well as DSD 64 and DSD 128 playback via DoP
AES and S/PDIF playback of up to 192 kHz / 24-bit PCM as well as DSD 64 playback via DoP
Dual-stage wide lock range PLL for jitter rejection on non s-locked sources
Third generation s-Lock dual stage PLL (phase lock loop) circuitry for low jitter clocking and sonic integrity
Two sets of line level outputs provided via RCA (unbalanced) and 1/4" TRS jacks (balanced) for connection to stereo monitors
RCA line outputs can be configured for variable or fixed DAC output mode for operation as a standalone digital to analog converter
Front panel rotary encoder provides level control of both headphone and the line output levels. Level adjustments are made in 0.5dB steps within a 95dB range
0.05dB channel level matching to ensure true stereo balance at any monitoring level
White 7-segment display is used to show headphone and stereo main output levels
X-feed (cross feed) simulates the acoustics of a loudspeaker listening environment which can improve imaging while reducing listening fatigue when using headphones. This feature employs a designed signal cross-feed, filtering and delay circuits to simulate HRTF (head related transfer functions)
High current transimpedance output amplifier design drives 8Ω loads. The m920 was specifically designed with low impedance headphones in mind
0.5% metal film resistors are used throughout and there are no electrolytic capacitors in the signal path. Sealed gold contact relays are used for all signal switching
Infrared remote control for level control, left/right balance, mute and more when using the optional remote control unit
Apple IR remote control is supported with optional pairing
USB firmware upgradability
UPC: 823821009201
In the Box
Grace Design m920 High Resolution Monitoring System
  • Limited, Transferable 5-Year Warranty on Parts and Labor
  • Table of Contents
    • 1Description
    Analog Input
    Gain Balanced Input:
    Headphone Output, Volume at Maximum: 0 dB
    Balanced Line Output, Volume at Maximum: -0.5 dB
    Unbalanced Line Output, Volume at Maximum: -8.0 dB
    Frequency Response Unbalanced In > Unbalanced Out: 4 Hz to 192 kHz
    @ 0 dBu out +/- .25 dB: 15 Hz to 50 kHz
    @ 0 dBu out +/- .5 dB: 9.5 Hz to 72 kHz
    Maximum Input Level Balanced Input: +22 dBu
    Unbalanced Input: +16 dBu
    Maximum Output Level Unbalanced output @1 kHz, 100 kΩ load: +22 dBu
    Balanced output @1 kHz, 100 kΩ load: +23 dBu
    Headphone output @1 kHz, 50 Ω load: +20 dBu
    Impedance Balanced Input: 106 kΩ
    Unbalanced Input: 53 kΩ
    Balanced Output: 95 Ω
    Unbalanced Output: 47.5 Ω
    Headphone Output: 1.2 Ω
    Dynamic Range @ 0dB gain, Balanced In > Balanced Out: 116 dB
    @ 0dB gain, Balanced In > Headphone Out: 117 dB
    THD + N, Balanced Input
    Gain <0.008%
    Headphone Out @ +10 dBu, 50 Ω load: <0.0050%
    Unbalanced Line Out @ +10 dBu, 100k kΩ load: <0.00045%
    Balanced Line Out @ +20d Bu, 100 kΩ load: <0.00075%
    Attenuator Channel matching: <0.05 dB
    Attenuator Range: 97.5 dB
    Balanced Output, volume at maximum, 22 Hz to 22 kHz: -93 dBu
    Balanced Output, volume at minimum, 22 Hz to 22 kHz: -99 dBu
    Unbalanced Output, volume at maximum, 22 Hz to 22 kHz: -103 dBu
    Unbalanced Output, volume at minimum, 22 Hz to 22 kHz: -105 dBu
    Volume Settings for Unity Gain Balanced in -> balanced out: 95
    Unbalanced in -> balanced out: 83
    Balanced in -> unbalanced out: 99 with Offset +8
    Unbalanced in -> unbalanced out: 95
    D/A Converter
    Input Formats AES, S/PDIF, TOSLINK:
    PCM (kHz): 44.1, 48, 88.2, 96, 176.4, 192,
    DSD 64

    PCM (kHz): 44.1, 48, 88.2, 96, 176.4, 192, 352.4, 384
    DSD 64, DSD 128

    Input Sample Rate: 32, 44.1, 48, 88.2, 96, 176.4, 192 kHz
    THD + N 44.1 kHz, 24-bit, 1 kHz, -1 dBFS, Unbalanced Out @ +15 dBu: <0.0005%
    44.1 kHz, 24-bit, 1 kHz, -1 dBFS, Balanced Out @ +15 dBu: <0.0005%
    Output Level Unbalanced Output @ 0 dBFS, Volume at maximum, trim at 0: +9 dBu
    Balanced Output @ 0 dBFS, Volume at maximum, trim at 0: +17.6 dBu
    Unbalanced Output @ 0 dBFS, Fixed DAC Output Mode: +8.2 dBu
    Power Requirements 120 V AC: 0.16 A
    230 V AC: 0.08 A
    Dimensions (H x W x D) 1.70 x 8.50 x 8.25" (43.20 x 215.90 x 209.50 mm)
    Weight 5.0 lb (2.2 kg)
    Packaging Info
    Package Weight 7.45 lb
    Box Dimensions (LxWxH) 16.4 x 14.3 x 4.7"

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