Grace Design m108 Overview
Sporting eight channels of transparent, musical, and transformerless mic preamplification, the Grace Design m108 is a versatile 1 RU mic preamp, audio interface, and A/D / D/A converter. Featuring eight XLR mic inputs, two Hi-Z instrument inputs, and copious digital and networking I/O, the m108 excels in the studio and on the stage.
With simple push-button operation, you can easily navigate the internal control interface, mix, and control vital functions like phantom power, phase, channel grouping, and more. Along with a stereo headphone output and Hi-Z and mic inputs, you also get DB25 connectors for analog output and digital AES3 output, optical ADAT connections, BNC wordclock, USB-B, 9-pin MIDI, and connections for remote and local control, including serial RS 485/422 ports, Ethernet port with web server for network control using standard web browser, and an Expansion slot for an optional Audinate/Dante network audio card. This version of the m108 also includes a DigiLink interface card for computers, sporting two mini-DigiLink ports for use with Avid systems or to connect to a second m108 for expanded output capabilities.
Peak Performance
This transformerless, transimpedance mic preamp design is unmatched in its ability to effortlessly resolve complex sonic waveforms, resulting in recordings of amazing clarity and depth. Integrated A/D conversion delivers digital signals to the workstation that are pure and beautiful.
Latest generation s-Lock PLL ensures pristine, jitter-free sample clocking from an external wordclock or Dante clock. An asynchronous mode USB interface provides the best possible jitter performance when connected to a computer.
Simple Operation
A push-button rotary encoder is used for navigating and operation, with a user interface that is simple and intuitive. Dedicated push buttons are assigned to core functions: 48V phantom power, phase reverse, channel grouping, and meter peak clear. A crisp OLED screen displays complete system information, including channel gain settings, metering, peak status, and the system setup menu.
Grace Design Remote Control Software
The m108 Control Software application allows for control of up to 12 m108 preamplifiers using the Ethernet control port on the m108. Each preamplifier in the system will have a dedicated control panel for operating the microphone preamplifiers, ADC, and clocking parameters.
The control application allows for the creation of channel groups as well as saving and recalling presets. The application runs under Windows (7, 8.1, and10) and Mac OS (10.11). For control of the m108 via Android or iOS, use the m108 web interface.
M108 Web Browser Control
The m108 has a built-in web browser controller allowing remote control from most web enabled Mac, Windows, iOS, and Android devices. This control has been optimized for Chrome, but will operate on most modern web browsers (excluding Internet Explorer).
This makes control of any m108 on an IP LAN as simple as entering the m108’s IP address into the browser’s navigation window—the web browser control from that preamp will automatically load and connect.
Notable Features
- 8 channels of balanced analog preamp outputs
- 8 mic preamplifiers
- Gain range of -8 to 74 dB
- Ribbon mic mode
- 8 channels of 192 kHz ADC outputs via AES, ADAT (4 ch. SMUX) and USB Class 2
- External wordclock in and out
- Reference DAC and headphone amplifier for low-latency monitoring of channel pairs or USB playback from a computer
- Channel 1 and 2 Hi-Z inputs on front panel
- High contrast, wide viewing angle OLED display for all system parameters and setup menu
- Combination RS 485/422 serial ports for control from existing m802 RCU or Pro Tools
- RJ45 Ethernet port for network control
- Expansion slot for optional Audinate/Dante network audio card
- Onboard cooling fan
- Built-in 90-250 VAC power supply
- Made in the USA
| Frequency Response | 15 Hz to 300 kHz (±0.2 dB) 4.5 Hz to 1 MHz (±3 dB) |
| THD+N | Analog Out: <0.003% A/D: <0.0004% D/A: <0.0006% (+8 dBu Out) Dante: 0.007% (High Gain) |
| Noise | -129 dB (at 60 dB, 50-Ohm Source) |
| Crosstalk | Analog I/O: -127 dB (at 1 kHz) A/D: -140 dB (at 1 kHz) D/A:<98 dB (at 1 kHz) Dante: -120 dB (at 1 kHz, Bandpass Response) |
| CMRR | +27 dB (at 1 kHz) |
| Maximum Output Level | Analog In to Out: +27 dBu (Balanced, at 1 kHz, 100-Kilohm Load) D/A: +18 dBu Dante: +23.5 dBu (at 1 kHz, 100-Kilohm Load) |
| Dynamic Range | A/D: >120 dBA D/A: 115 dBA |
| Sampling Rate | 44.1 to 192 kHz |
| Jitter | <40ps RMS |
Display
| Panel Type | OLED |
| Display Size | Not Specified by Manufacturer |
| Touchscreen | No |
Inputs / Outputs
| USB I/O | 1 x USB-B 2.0 Female Input/Output |
| Audio I/O | 8x XLR 3-Pin Mic Input (With Phantom Power) 2x 1/4" TS Hi-Z/Instrument Input 1x TOSLINK Optical ADAT Input 1x BNC Coaxial Input (Word Clock In) 1x DB-9 MIDI Input 1x RJ45 Coaxial Input (Ethernet Control) 1x DB-25 AES3 Output (8 Channels) 1x DB-25 Line Output (8 Channels) 1x 1/4" TRS Headphone Output 1x TOSLINK Optical ADAT Output 1x BNC Coaxial Output (Word Clock Out) 1x DB-9 MIDI Output |
Power
| Power Source | AC Input |
| AC Input Power | 90 to 250 VAC, 50 / 60 Hz |
| Power Consumption | 25 W |
Physical
| Mounting | Front: 4x Standard Rackmount Hole |
| Color | Black |
| Material of Construction | Metal |
| Dimensions | 19 x 16.75 x 10" / 48.3 x 42.55 x 25.4 cm (1 RU) |
| Weight | 5.2 lb / 2.4 kg |
In the Box
- Grace Design m108 8-Channel Microphone Preamplifier / ADC with DigiLink Card
- Power Cable (6')
- Power Supply
- USB-A to USB-B Cable
- Bag of Rubber Feet and Rack Screws
- 5-Year Manufacturer Warranty
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