Effortless, precision control for large monitoring systems.

The Grace Designs M906 5.1 Monitor Controller is a versatile, sonically invisible monitor system that enables you to hear and manipulate the finest detail. It features the same high-resolution as the acclaimed GD mic preamps, with balanced and unbalanced analog 5.1 inputs, multiple balanced stereo analog inputs, plus digital 5.1 and stereo inputs.

Grace Design m906 5.1 Monitor Controller Features:

Multiple 5.1 and stereo analog inputs
24-bit/192kHz digital 5.1 and stereo inputs — AES3, S/PDIF, ADAT, and TOSLINK
s-Lock phase lock loop word clock regeneration for ultralow jitter and rock-solid digital stability
Precision main and headphone level controls with a 100dB range in 0.5 dB steps
All controls built into an elegant, convenient desktop remote control unit
All I/O and audio are routed in a 2U rack mount mainframe with an external 1U 1/2 rack power supply
Multiple speaker set selection — 2 surround sets, up to 3 stereo sets
High current audiophile headphone amplifier built in — one output jack on remote control unit and one on the mainframe unit
Complete system level calibration (inputs, outputs, inter-channel balance, dim) and individual channel solo/mute
Balanced talkback microphone input and activation switch with additional external foot switch control jack
Fixed level 5.1 DAC output for direct digital transfers

Grace Design m906 5.1 Monitor Controller Specifications:

ANALOG INPUT
Frequency Response: +/-3dB: 3Hz — 250kHz
Channel Tracking Accuracy: Any channel: +/-0.05dB

THD+N @ 0dB gain, 1kHz:
+20dBu out: <0.001% (0.00075% typical)
+10dBu out: <0.003% (0.001% typical)
0dBu out: <0.009% (0.005% typical)

Intermodulation Distortion SMTPE/DIN 4:1 50Hz, 7kHz
@+20dBu out: <0.002% (0.0015% typical)
@ 0dBu out: <0.008% (0.006% typical)

Dynamic Range
20-22kHz bandwidth: 112dB
20-22kHz bandwidth and A weighting filter: 115dB

Output Noise
20-22kHz bandwidth, -20dB gain
High gain mode: -89dBu
Low gain mode: -98dBu
20-22kHz bandwidth and A weighting filter, -20dB gain
High gain mode: -91dBu
Low gain mode: -99dBu

Phase Deviation
20Hz to 20kHz: < 4ø
10Hz to 100kHz: < 15ø

Crosstalk any channel
100Hz: < 100dB
1kHz: < 100dB
20kHz: < 85dB

Balanced Input CMRR
60Hz: > 65dB
1kHz: >65dB
10kHz: >60dB

Gain Range
Low gain mode (0.5dB steps): -105.5dB to +20dB
High gain mode (0.5dB steps): -95.5dB to +30dB

Maximum Output Level
Low gain mode (balanced): +15dBu
High gain mode (balanced): +27dBu

Maximum Input Level
Balanced inputs: +30dBu
Unbalanced inputs: +20dBu

Impedances
Balanced inputs: 30kOhms
Unbalanced inputs: 50kOhms
Balanced outputs: 300 Ohms
Minimum load impedance: 300 ohms

DIGITAL TO ANALOG CONVERTER FIXED OUTPUTS
THD+N 1kHz, -1dBFS, 20-22kHz bandwidth (44.1kHz): 0.0015%
Dynamic Range: 20-22kHz bandwidth: >111dB

Output Levels
User selectable (0dBFS): +16dBu / +24dBu
Fixed output trim range (0.5dB steps): -95.5dB to +30dB

Input Lock Range
AES3/SPDIF: 32kHz to 192kHz
TOSLINK: 32kHz to 96kHz
ADAT LIGHTPIPE: 30kHz 55kHz

s-Lock Sample Clock Intrinsic Jitter
20-22kHz bandwidth: <25ps

s-Lock Sample Clock Jitter Rejection
1kHz sine jitter: -40dB

s-Lock Supported Sample Rates
AES3, SPDIF: 44.1, 48, 88.2, 96, 176.4, 192kHz
TOSLINK: 44.1, 48, 88.2, 96kHz
ADAT LIGHTPIPE: 44.1, 48kHz

s-Lock Capture Range:
44.1, 48kHz: +/-10Hz
88.2, 96kHz: +/- 20Hz
176.4, 192kHz: +/- 40Hz

Word Clock/Superclock Input
Impedance (switchable): 75 Ohms / 1M Ohms
Minimum Voltage: 3V peak to peak
Maximum Voltage: 5V peak to peak
Word clock frequencies supported: 44.1, 48, 88.2, 96, 176.4, 192kHz
Superclock frequencies supported: 11.2896MHz, 12.288MHz (256x fs)

POWER SUPPLY / MECHANICAL SPECS
Power consumption: 40W
Input Voltage 50-60Hz: 100, 120, 220, 230-240VAC

Dimensions
Main chassis IEC 2U: 3.5" x 10.5" x 17"
Remote control unit: 1.6" x 8" x 5.25"
Power supply unit: 1.7" x 8.5" x 8.5"

Weight
Main chassis: 14.1 lbs. / 6.4kg
Remote control unit: 2.3 lbs. / 1kg
Power supply unit: 6.5 lbs. / 2.9kg