Sound Pure's Take
Grace has gone above and beyond to ensure the M905 has not only some of the best sounding D/A converters you can buy, but they really were dead set on making the sexiest and sleekest design with the touch screen remote. It is NOT all smoke and mirrors, just simply a fantastic touch to a design idea that has been in production (from previous models) for nearly a decade. The m905 is the upgrade to the older m904 monitor solution as Grace redesigned every aspect of the box with the knowledge from the previous models.
With the m905, updating the converters and bringing them to the highest quality was step one. The D/A is the heart of your mixing platform as it affects every decision you make. The D/A is incredibly detailed but isn't overly harsh or pushed. It allowed us to really dive into our mixes and hear every aspect of what you are doing. Whether you are polishing the 2 Buss for a mix or dialing just the right reverb for your vocals, you can rely on the D/A in the m905 to deliver.
Now for the part that tops it off, the Remote. The touch screen design is just fantastic. It gives you everything you need to set your studio up the way YOU want to monitor. For us, one of the nicest features is being able to level match 2 different monitors inside the m905. Nothing is worse than trying to make decisions, changing monitors and having the outputs drastically different between your small pair and large pair of monitors. Just an example of the depth Grace went to in the design, you can calibrate every aspect of m905 to suit your needs.
From Grace Design
This is our second generation stereo monitor controller, engineered from the ground up to provide unrivaled sonic purity with a comprehensive and powerful feature set.
The m905 represents a new benchmark for audio playback quality. DAC performance is on par with the finest esoteric mastering equipment available. Our redesigned s-Lock™ PLL ensures ultra-low jitter clock regeneration. An asynchronous USB class 2 interface allows the m905 to act as the master clock of the computer's USB audio bus, effectively eliminating interface induced jitter for computer audio playback. And finally, meticulous analog circuitry measures with outstanding numbers in dynamic range, distortion and noise performance, ensuring bracingly open, detailed and musical playback of any input source.
All main audio and power supply circuitry is housed in a 2U rack mount mainframe, while system control is managed by a sleek, ergonomic remote control unit. This new RCU is a combination of dedicated hardware and a color graphical LCD display. All primary monitoring features are accessed via hardware switches and a rotary encoder, while all system information is presented by the graphic LCD and illuminated switches. This hybrid design allows for the solid feel and function of traditional hardware with the added power and functionality of a graphical user interface.
The GUI is designed so that any engineer unfamiliar with the m905 can use the system immediately and confidently. Then with a minimal time investment, advanced functions can be accessed and controlled with ease. Additional features include: naming individual inputs and speaker outputs, calibrating level offsets of any input and output, setting preset levels, and much more. The setup menus only ever drill down one level, so the main operating screen is always one button away. And when returning to any previously visited setup menu, its previous edit status is remembered, keeping redundant navigation and editing to a minimum.
| ANALOG I/O THD+N at Maximum Volume, 1kHz, 22Hz-22kHz BW +20dBu out <0.0008% +10dBu out <0.0008% 0dBu out <0.002% Intermodulation Distortion SMTPE/DIN 4:1 50Hz, 7kHz @+20dBu out <0.002% @ 0dBu out <0.0015% Frequency Response Balanced Inputs +/-3dB 3Hz to 1.25MHz Unbalanced Input +/-3dB 3Hz to 275kHz Dynamic Range 20-22kHz bandwidth 118dB 20-22kHz bandwidth and A weighting filter 121dB Output Noise 20-22kHz bandwidth, at -20dB gain -99dBu 20-22kHz bandwidth and A weighting filter, at -20dB Gain -102dBu Phase Deviation 20Hz to 20kHz <10 degrees 10Hz to 100kHz < 19 degrees Crosstalk any channel 100Hz <104dB 1kHz <100dB 20kHz <79dB Balanced Input CMRR 60Hz >90dB 1kHz >85dB 10kHz >70dB Gain Range -104dB to +13dB Channel Tracking Accuracy Any channel +/-0.1dB Maximum Output Level +26dBu Maximum Input Level Balanced inputs +29dBu Unbalanced inputs +21dBu Impedances Balanced inputs 88k Ohms Unbalanced inputs 53k Ohms Balanced outputs 300 Ohms Minimum load impedance 300 Ohms External Talkback Mic Preamp Gain +7dB to +70dB in 1dB steps DIGITAL TO ANALOG CONVERTER FIXED OUTPUTS Output Levels User selectable (0dBFS) -76dBu to +24dBu in 0.5dB steps Fixed output trim range (0.5dB steps) THD+N 1kHz, -1dBFS, (0dBFS = +20dBu), 20-22kHz bandwidth 0.0006% Dynamic Range 20-22kHz bandwidth, 0dBFS = +20dBu (AES17 filter) 117dB 20-22kHz bandwidth, 0dBFS = +20dBu (A-weighted) 119dB Input Lock Range AES3/SPDIF 44.1kHz +/-400Hz 48kHz +/-700Hz 88.2kHz +/-1200Hz 96kHz +/-1300Hz 176.4kHz +/-2000Hz 192kHz +/-2000Hz TOSLINK 44.1kHz +/-400Hz 48kHz +/-700Hz 88.2kHz +/-1200Hz 96kHz +/-1300Hz ADAT LIGHTPIPE™ 8 Channels at 44.1kHz and 48kHz 4 Channels at 88.2kHz and 96kHz (s/mux) 44.1kHz +/-50Hz 48kHz +/-70Hz 88.2kHz +/-50Hz 96kHz +/-70Hz USB 44.1, 48, 88.2, 96, 176.4, 192kHz s-Lock™ Capture Range 44.1kHz +/- 6Hz 48kHz +/- 7Hz 88.2kHz +/- 14Hz 96kHz +/- 20Hz 176.4kHz +/- 24Hz 192kHz +/- 30Hz Word Clock / Superclock Input Impedance (switchable) 75 ohm / 1Meg ohm 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 N/A POWER SUPPLY / GENERAL Power consumption 60W Input Voltage 50-60Hz 100VAC – 240VAC Dimensions Main chassis IEC 2U 3.5" x 10.5" x 17" Remote control unit 8.9" x 5.1" x 2.2" Weight Main chassis 7.8lbs Remote control unit 2.2lbs | |
|---|---|
| ANALOG I/O | |
| THD+N at Maximum Volume, 1kHz, 22Hz-22kHz BW | |
| +20dBu out | <0.0008% |
| +10dBu out | <0.0008% |
| 0dBu out | <0.002% |
| Intermodulation Distortion SMTPE/DIN 4:1 50Hz, 7kHz | |
| @+20dBu out | <0.002% |
| @ 0dBu out | <0.0015% |
| Frequency Response | |
| Balanced Inputs +/-3dB | 3Hz to 1.25MHz |
| Unbalanced Input +/-3dB | 3Hz to 275kHz |
| Dynamic Range | |
| 20-22kHz bandwidth | 118dB |
| 20-22kHz bandwidth and A weighting filter | 121dB |
| Output Noise | |
| 20-22kHz bandwidth, at -20dB gain | -99dBu |
| 20-22kHz bandwidth and A weighting filter, at -20dB Gain | -102dBu |
| Phase Deviation | |
| 20Hz to 20kHz | <10 degrees |
| 10Hz to 100kHz | < 19 degrees |
| Crosstalk any channel | |
| 100Hz | <104dB |
| 1kHz | <100dB |
| 20kHz | <79dB |
| Balanced Input CMRR | |
| 60Hz | >90dB |
| 1kHz | >85dB |
| 10kHz | >70dB |
| Gain Range | -104dB to +13dB |
| Channel Tracking Accuracy | |
| Any channel | +/-0.1dB |
| Maximum Output Level | +26dBu |
| Maximum Input Level | |
| Balanced inputs | +29dBu |
| Unbalanced inputs | +21dBu |
| Impedances | |
| Balanced inputs | 88k Ohms |
| Unbalanced inputs | 53k Ohms |
| Balanced outputs | 300 Ohms |
| Minimum load impedance | 300 Ohms |
| External Talkback Mic Preamp Gain | +7dB to +70dB in 1dB steps |
| DIGITAL TO ANALOG CONVERTER FIXED OUTPUTS | |
| Output Levels | |
| User selectable (0dBFS) | -76dBu to +24dBu in 0.5dB steps |
| Fixed output trim range (0.5dB steps) | |
| THD+N | |
| 1kHz, -1dBFS, (0dBFS = +20dBu), 20-22kHz bandwidth | 0.0006% |
| Dynamic Range | |
| 20-22kHz bandwidth, 0dBFS = +20dBu (AES17 filter) | 117dB |
| 20-22kHz bandwidth, 0dBFS = +20dBu (A-weighted) | 119dB |
| Input Lock Range | |
| AES3/SPDIF | 44.1kHz +/-400Hz 48kHz +/-700Hz 88.2kHz +/-1200Hz 96kHz +/-1300Hz 176.4kHz +/-2000Hz 192kHz +/-2000Hz |
| TOSLINK | 44.1kHz +/-400Hz 48kHz +/-700Hz 88.2kHz +/-1200Hz 96kHz +/-1300Hz |
| ADAT LIGHTPIPE™ 8 Channels at 44.1kHz and 48kHz 4 Channels at 88.2kHz and 96kHz (s/mux) | 44.1kHz +/-50Hz 48kHz +/-70Hz 88.2kHz +/-50Hz 96kHz +/-70Hz |
| USB | 44.1, 48, 88.2, 96, 176.4, 192kHz |
| s-Lock™ Capture Range | |
| 44.1kHz | +/- 6Hz |
| 48kHz | +/- 7Hz |
| 88.2kHz | +/- 14Hz |
| 96kHz | +/- 20Hz |
| 176.4kHz | +/- 24Hz |
| 192kHz | +/- 30Hz |
| Word Clock / Superclock Input | |
| Impedance (switchable) | 75 ohm / 1Meg ohm |
| 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 | N/A |
| POWER SUPPLY / GENERAL | |
| Power consumption | 60W |
| Input Voltage 50-60Hz | 100VAC – 240VAC |
| Dimensions | |
| Main chassis IEC 2U | 3.5" x 10.5" x 17" |
| Remote control unit | 8.9" x 5.1" x 2.2" |
| Weight | |
| Main chassis | 7.8lbs |
| Remote control unit | 2.2lbs |
Warranty
This item is sold without the Sound Pure 3-year warranty (used / B-stock / dealer-exempt). Coverage terms for items in this category live in Terms & Conditions, Section 27.
Returns
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