Grace Design m906 5.1 reference monitor controller Grace Design

At the core, the m906 is a purist level control for monitoring surround (or stereo) audio sources. But a closer look reveals a highly intelligent feature set that makes it a vital nerve center for any recording, mastering, or post facility centered around a digital audio workstation. It is configured as a 2U rack mount mainframe controlled by a sleek, powerful desktop remote control, with all audio kept in the mainframe and all control via the remote control.

The m906 offers a full complement of balanced and unbalanced analog 5.1 and digital 5.1 and stereo inputs, the latter featuring our latest generation reference 24bit/192kHz DAC technology with our proprietary s-Lock™ PLL for rock solid digital stability. All inputs and outputs on the m906 can be user calibrated for seamless integration into any playback environment with all types of playback equipment.

The m906’s signal path is designed to deliver nothing short of the best performing, transparent audio available. All components are chosen for audiophile performance and long term reliability. Level controls, the heart of a monitor controller, are low distortion precision devices which provide a 100dB range in silent .5dB steps.

Included as a standard feature is our acclaimed reference headphone amplifier circuitry (from our m902), with one output jack on the mainframe and one additional output on the remote. This unique circuitry provides precision headphone amplification for critical monitoring, mixing and mastering.

This m906 can be equipped with an optional DOWNMIX module that creates a stereo L+R mix of a 6 channel surround source. All standard Dolby mix ratios can be calibrated by the user for both the center and surround channels.

While the m906 boasts a remarkably full set of features, the real achievement for us is to offer this while maintaining the impeccable, transparent audio performance for which all of our products are famous.

 

Features:

multiple 5.1 and stereo analog inputs

24bit/192kHz digital 5.1 and stereo inputs- AES3, S/PDIF, ADAT and TOSLINK

s-Lock™ phase lock loop sample clock regeneration for ultra-low jitter and rock solid digital stability

precision speaker and headphone level controls with a 100dB range in 0.5dB steps

every electrical and mechanical design element maximized for absolute purist audiophile performance

all controls are built into an elegant, convenient desktop remote control unit

all I/O and audio are routed in a 2U rack mount mainframe powered by an external 1U 1/2 rack power supply

control up to three speaker systems – two 5.1 or up to three stereo

m902 style high-current audiophile headphone amplifier built in with one output 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 audio transfers

optional downmix module supports all standard Dolby mix ratios

optional AES Loop-thru feature provides four AES digital outputs for passing signals to other devices downstream

5 year transferable warranty on parts and labor

Specifications:

SPECIFICATIONS
ANALOG INPUT 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)
Frequency Response
+/-3dB	3Hz – 250Khz
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	< 4
10Hz to 100kHz	< 15
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
Channel Tracking Accuracy
Any channel	+/-0.05dB
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	30k Ohms
Unbalanced inputs	50k Ohms
Balanced outputs	300 Ohms
Minimum load impedance	300 Ohms
DIGITAL TO ANALOG CONVERTER FIXED OUTPUTS
Output Levels
User selectable (0dBFS)	+16dBu / +24dBu
Fixed output trim range (0.5dB steps)	-95.5dB to +30dB
THD+N
1kHz, -1dBFS, 20-22kHz bandwidth (44.1kHz)	0.00%
Dynamic Range
20-22kHz bandwidth	>111dB
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	60W
Input Voltage 50-60Hz	100, 120, 220, 230-240VAC
Dimensions
Main chassis IEC 2U	3.5″ x 10.5″ x 17″
Remot control unit	1.6″ x 8″ x 5.25″
Power supply unit	1.7″ x 8.5″ x 8.5″
Weight
Main chassis	14.1lbs / 6.4kg
Remote control unit	2.3lbs / 1kg
Power supply unit	6.5lbs / 2.9kg
All specifications are subject to change without notice