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Grace Design m908 - Surround Sound Monitor Controller (Dante Option)

  • Dale #:

    GRAC-M908DANTE
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Description

Ships with Dante card pre-installed, analog slots are both empty. The m908 Monitor Controller is designed for speaker systems up to 24 channels, from stereo to Dolby Atmos™, SONY 360RA™ or any format in between. Built on Grace Design's legacy of reference audio design, the m908's audio performa... Read More

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Description

Ships with Dante card pre-installed, analog slots are both empty.

The m908 Monitor Controller is designed for speaker systems up to 24 channels, from stereo to Dolby Atmos™, SONY 360RA™ or any format in between. Built on Grace Design's legacy of reference audio design, the m908's audio performance delivers impeccable clarity and detail. These latest generation AD / DA converters provide incredible dynamic range and resolution, while all new analog circuitry is designed to be effortlessly transparent and musical.

Features:

  • Standard digital inputs include: 24 channel AES3 digital, 16 channel ADAT Lightpipe, USB 24 channel inputs, AES3, S/PDIF, and TOSLINK stereo inputs
  • Analog inputs are optional: 8 channel ADC module for 8 or 16 channel analog inputs – these modules are sold separately
  • Standard outputs include: 24 channel AES3 digital out, 16 channel analog balanced out, 24 channels USB2 out
  • Optional Dante™, DigiLink™, Ravenna / AES67 / st2110 modules for an additional 32 channels of I/O
  • 4th generation s-Lock pll clocking system for vanishingly low jitter
  • High resolution volume control
  • Complete bass management capability
  • 12 bands of parametric room correction EQ on every channel / variable numbers of bands per channel, 288 bands
  • 64-bit fixed-point filters for room correction and bass management
  • Channel level and delay calibration
  • Comprehensive downmix control
  • Built in real time SPL meter
  • Powerful and intuitive remote control unit for access to all system controls and calibration
  • Dual redundant external power supply
  • Reference quality headphone amplifier with cross-feed
  • Flexible talkback system with built-in mic on remote control and mic input for external talkback mics
  • Up to 8 stereo CUE paths
  • 4 General Purpose Input and Output pins for interfacing to external systems


The All in One Solution

The m908 system consists of a mainframe audio control unit, remote control unit, and a power supply with dual-redundant universal input power modules. The remote control is based on the m905 stereo monitor controller, but scaled up to accommodate added features and playback channel count.

Full Featured
Standard features include a total of 68 digital input channels via AES3, TOSLINK, S/PDIF, ADAT Lightpipe, and USB2. Outputs include 16 balanced analog output channels and 24 digital output channels. Up to 16 channels of analog inputs are available with the addition of the optional 8 channel ADC modules, and an additional option module slot provides up to 32 additional digital I/O channels via Dante™, DigiLink™ and Ravenna / AES67 / st2110.

Powerful DSP
Up to 24 input channels can be received simultaneously and routed to the 24 channel processor, and sample rates of up to 192kHz / 24bit are supported. A powerful DSP section allows for 12 bands of parametric room correction EQ on every channel (or variable numbers of bands per channel totaling up to 85), comprehensive bass management features and individual channel delay.

Plug and Play Simplicity
The m908 is a fully self contained plug and play monitor controller, with a full complement of monitoring features including cue channels, built in talkback mic, mono, mute and dim controls, and an exhaustive list of functions relating to surround and immersive playback systems. It is designed to enable professionals and facilities to update their workflows for immersive audio playback with a minimum of effort and cost.

Web UI for Control and Setup
The all-new embedded web control and setup platform allows you to control all monitoring features, and edit, load and store all system parameters. The interface works on any desktop or device browser that is connected to the same LAN as the m908.

Using this platform is as simple as entering the IP address of your m908 into a browser. The m908 will automatically load the control platform and work from there. There is nothing to download or install and it is completely agnostic to the desktop or device OS. This allows complete control and editing of all m908 system parameters from your screen without having to navigate the m908 RCU setup menus. This significantly increases the simplicity and efficiency of operating the m908!

Powerful Room Correction EQ Capability
Firmware v.2 and up provides a significant increase in the amount of total available EQ bands. Since the m908’s original release, one thing has become clear: Dolby ATMOS Room calibration can require very large amounts of room correction EQ. With this release, the m908 can now run 12 bands of EQ per channel on all 24 outputs, at any sample rate (288 bands available).

With the new control and setup software, EQ settings can be copy / pasted between individual speakers or speaker systems. Also, entire room EQ settings can now be imported and exported directly to the m908 imported via .csv files.

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Product Specs

SIGNAL PROCESSING
Signal Processing – Delay Input sync delay 0-1000 ms, 5ms steps
Speaker channel delay 0-250ms, 0.01ms steps
Signal Processing – Bass Management Crossover Frequency 25-150Hz, 1Hz steps
HPF Response 6, 12,18, 24dB/octave
6dB/octave
12dB/octave Linkwitz Riley
18dB/Octave Butterworth
24dB/Octave Linkwitz Riley
LPF Response 6, 12,18, 24dB/octave
6dB/octave 12dB/octave Linkwitz Riley - Inverted LPF Output
8dB/Octave Butterworth
24dB/Octave Linkwitz Riley
Signal Processing – Room Correction EQ
Number of bands per Channel Up to 12
Total number of bands 288
Filter frequency range, 246 steps ~1/24 octave spacing 10-20,000Hz
Peak Filter Q 0.02-50
Shelf Filter Slope “S” 0.02-10
Filter Shapes Low Shelf, Low Pass, Peak, High Pass, High Shelf
Monitor Control
Attenuation Range -inf, -99.5dB to 0dB, 0.5dB steps
DIM Attenuation -30.0dB to 0.0dB, 0.5dB steps
MONO Sum Law -9.0dB to 0dB, 0.5dB steps
Speaker System Latency AD in to DA out Fs=44.1kHz 5.1ms
Fs=48kHz 4.7ms
Fs=88.2kHz 2.6ms
Fs=96kHz 2.4ms
Fs=176.4kHz 1.3ms
Fs=192kHz 1.2ms
Cue System Latency AD in to DA out Fs=44.1kHz 0.70ms
Fs=48kHz 0.64ms
Fs=88.2kHz 0.35ms
Fs=96kHz 0.32ms
Fs=176.4kHz 0.15ms
Fs=192kHz 0.14ms
DA CONVERTER CONTROL ROOM OUTPUTS Fs=48kHz unless otherwise noted.
THD+N 0dBFS In, +18dBu Out, 22Hz-22kHz BW <-115dB
Intermodulation Distortion, SMTPE/DIN 4:1 50Hz, 7kHz, 1.0V Out <107dB
Frequency response, +/-0.2dB / -3dB 44.1kHz Fs DC-20.5kHz DC-20.6kHz
48kHz Fs DC-22.2kHz DC-23.5kHz
88.2kHz Fs DC-27kHz DC-43.2kHz
96kHz Fs DC-27kHz DC-47kHz
176.4kHz Fs DC-27kHz DC-85.5kHz
192kHz Fs DC-27kHz DC-92.7kHz
Dynamic Range 20-22kHz bandwidth 123dB
20-22kHz bandwidth and A weighting filter 125dB
Output Level 0dBFS +18dBu
Output Noise 20-22kHz-105dBu
20-22kHz, A weighting filter-107dBu
Crosstalk Interchannel crosstalk, 1kHz-123dB
Interchannel crosstalk, 10kHz-103dB
Attenuation Range 0 to -99dB, 0.5dB steps
Channel Tracking Accuracy +/-0.05dB
Maximum Output Level +18dBu
Output Impedance (balanced) 300Ω
A/D CONVERTER OPTIONFs=48kHz unless otherwise noted.
THD+N, 1kHz, -1dBFS, 20Hz-22kHz < 0.0004%
Intermodulation Distortion, IMD SMPTE 4:1 60Hz, 7kHz, -3dBFS <0.002%
Frequency response, +/-0.2dB / -3dB 44.1kHz Fs 14Hz-20.6kHz 4.5Hz-21.1kHz
48kHz Fs 15Hz-22.4kHz 4.5Hz-23.0kHz
88.2kHz Fs 14.9Hz-41.1kHz 4.5Hz-42.3kHz
96kHz Fs 15Hz-44.7kHz 4.5Hz-46.1kHz
176.4kHz Fs 15.5Hz-79.6kHz 4.5Hz-88.09kHz
192kHz Fs 15Hz-86.7kHz 4.5Hz-95.97kHz
Dynamic range 22Hz-24kHz, 48kHz >117dB
“A” weighted, 48kHz >120dB
Full scale input level 0dBFS Jumper Selectable +20dBu OR +24dBu
Crosstalk Interchannel crosstalk, 1kHz-140dB
Interchannel crosstalk, 10kHz-127dB
Input Impedance Balanced Input (DB25 or XLR) 20k Ω
Unbalanced Input 10k Ω
TALKBACK MIC IN > TALKBACK MIC OUT (ANALOG)
Gain Range +11, +19-74dB in 1dB steps
Frequency Response @ 40dB gain ± 0.2dB (50Ω source) 15Hz-300kHz
@ 40dB gain ± 3dB (50Ω source) 4.5Hz-1.0MHz
THD+N @ 20dB gain +20dBu out, 1kHz <.0003%
@ 40dB gain +20dBu out, 1kHz <.0010%
@ 60dB gain +20dBu out, 1kHz <.0080%
Intermodulation Distortion @ 40dB gain +20dBu out
SMPTE/DIN 1:1 (50Hz, 7kHz) <.001%
SMPTE/DIN 4:1 (50Hz, 7kHz) <.0020%
Noise - Referred to Input @ 60dB gain, 50Ω source-129dB
@ 60dB gain, 150Ω source-127dB
@ 60dB gain, 600Ω source-123dB
Phase Deviation, 40-20KHz @ 40dB gain <5°
Crosstalk Any Channel @ 40dB gain 1kHz-127dB
Any Channel @ 40dB gain 10kHz-113dB
CMRR @ 60dB gain, +20dBu CM, 1kHz >75dB
@ 60dB gain, +20dBu CM, 10kHz >85dB
@ 60dB gain, +20dBu CM, 60Hz >55dB
Maximum Output Level Balanced, 1kHz, 100kΩ Load +27dBu
Balanced, 1kHz, 600Ω Load +26.2dBu
Impedance Input 8kΩ
Output 300Ω
HEADPHONE AMPLIFIER
THD+N +10dBu Out, 22Hz-22kHz BW <0.0009%
+10dBu Out, 22Hz-22kHz BW, 20Ω load(300mW) <0.030%
Intermodulation Distortion SMPTE/DIN 4:1 50Hz, 7kHz, 10dBu out, no load <0.0015%
SMPTE/DIN 4:1 50Hz, 7kHz, 10dBu out, 20Ω load (300mW) <0.060%
Frequency response Fs=192kHz , ±3dB 0.2Hz-92kHz
Fs=192kHz , ±0.2dB 1Hz-27kHz
Dynamic Range 20-22kHz bandwidth >114dB
20-22kHz bandwidth and A weighting filter >118dB
Output Noise 20-22kHz < -93dBu
20-22kHz, A weighting filter < -97dBu
Crosstalk Interchannel crosstalk, 1kHz < -107dB
Interchannel crosstalk, 1kHz < -98dB
Channel Matching Accuracy +/-0.05dB
Maximum Output Level, Both Channels Driven (Level / Power) 100K Ω load +21.0dBu NA
20 Ω load +16.4dBu 1.3W
32 Ω load +19.2dBu 1.57W
600 Ω load +21.4dBu 280mW
Headphone Output Impedance 1.3Ω
GPIO
GPIO Inputs +5V / +3.3V
Input High Voltage level >3.3V >2.0V
Input Low Voltage level <1.5V <0.8V
Max Input Voltage level 5.5V 3.8V
GPIO Outputs +5V +3.3V
Output High Voltage 5.0V 3.3V
Max Output Current 15mA 10mA
Note GPIO outputs have 330Ω series output resistors
External ACU Talkback switch input Switch input pull-up voltage 3.3V
Switch input pull-up resistance 10KΩ
Tally output voltage 5.0V
Tally output resistance 330Ω
CLOCKING
Supported Sample Rates 44.1, 48, 88.2, 96, 176.4, 192 kHz
External Clock Lock Range FS +/- 1%
Word Clock Input Voltage (BNC) 200mV-5.0V peak to peak
Word Clock Output voltage 5V peak to peak
Word Clock Input Impedance 48kΩ or 75Ω
Word Clock polarity Left data: High, Right data: Low
Intrinsic Jitter, 10Hz-20kHz BW Internal Clock <40ps RMS
External Clock <40ps RMS
Jitter Rejection Corner Frequency 0.5Hz
GENERAL
Dimensions Audio Control Unit: 19"W x 3.5" H x 10.9" L
Remote Control Unit: 10.5" W x 2.5" H x 5.1" L
Power Supply Unit: 8.5" W x 1.7" H x 8.2" L
Weight Audio Control Unit: 6.8lbs (3.2kg)
Remote Control Unit: 2.2lbs (1.0kg)
Power Supply Unit: 2.6lbs (1.2kg)
Power Consumption 90-250V~ 50-60Hz 50W Max

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