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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:
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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