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Description
From 25 years experience of creating acclaimed professional audio products, comes the latest evolution of Grace Design's mic preamplifier design: the m108. With eight channels of transparent, musical mic preamplification, state of the art A/D conversion, multiple digital output formats, and flexible local or remote controlled operation, the m108 is a vital addition to any modern audio production environment.
Features:
UNRIVALED PERFORMANCE
Our 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 clock when clocking from external word clock or Dante clock. And 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.
POWERFUL CONFIGURATION
Based on the acclaimed success of our m802 remote controlled mic preamplifier, the m108 distills the best of these achievements into a sleek, elegant 1U chassis design. Our 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 clock when clocking from external word clock or Dante clock. And an asynchronous mode USB interface provides the best possible jitter performance when connected to a computer.
EVOLVED I/O CAPABILITY
The m108 is capable of connecting to a wide array of equipment with modern audio formats. Standard output connectivity includes balanced analog, AES3, ADAT and USB. The option slot allows users to add cards for Digilink, Dante or Ravenna (including ST2110 / AES67). Additionally, a Control Room Output (CRO) card can be installed in the option slot, allowing the m108 to act as a monitor controller for a pair of studio monitors.
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 (7,8.1,10) 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, and the web browser control from that preamp will automatically load and connect. See the m108 owner’s manual for complete details.
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Product Specs
MICROPHONE PREAMPLIFIER – Analog IN to Analog OUT | |
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: +23dBu Unbalanced, 1kHz, 100kΩ Load: +21dBu |
Impedance | Input Ribbon Mode (+48V OFF): 19kΩ Input +48V ON: 8kΩ |
A D CONVERTER - All measurements at 15dB Gain, Fs=48kHz unless otherwise noted. | |
Dynamic range | 22Hz-24kHz, 14dB Gain, 48kHz: >117dB “A” weighted, 14dB Gain, 48kHz: >120dB |
THD+N | 1kHz, -1dBFS, 15dB Gain 20Hz-22kHz: < 0.0004% |
Intermodulation Distortion | IMD SMPTE 4:1 60Hz, 7kHz, -3dBFS: <0.002% |
Frequency response (+/-0.2dB, -3dB) | 44.1kHz / Fs: 15Hz-21kHz / 6Hz-22kHz 48kHz / Fs: 15Hz-23kHz / 6Hz-24kHz 88.2kHz / Fs: 15Hz-41kHz / 6Hz-44kHz 96kHz / Fs: 15Hz-45kHz / 6Hz-48kHz 176.4kHz / Fs: 15Hz-54kHz / 6Hz-72.5kHz 192kHz / Fs: 15Hz-59kHz / 6Hz-79kHz |
Full scale input level, analog output @ 0dBFS | +24dBu |
Crosstalk | Interchannel crosstalk, 1kHz < -140dB Interchannel crosstalk, 10kHz < -130dB |
Group Delay , AES3 Out <22/Fs | 44.1kHz Fs: <0.5ms 48kHz Fs: <0.5ms 88.2kHz Fs: <0.25ms 96kHz Fs: <0.25ms 176.4kHz Fs: <0.13ms 192kHz Fs: <0.13ms |
DA CONVERTER Headphone Amplifer - All measurements at Fs=48kHz unless otherwise noted. | |
THD+N | 0dBFS In, Volume + 90, +8dBu Out, 22Hz-22kHz BW <0.0006% 0dBFS In, 1.0V Out (31mW), 22Hz-22kHz BW, 32Ω load <0.0025% |
Intermodulation Distortion | SMTPE/DIN 4:1 50Hz, 7kHz, 1.0V out, no load <0.008% SMTPE/DIN 4:1 50Hz, 7kHz, 1.0V out, 32Ω load <0.008% |
Frequency response | Fs=96kHz , ±3dB 0.5-45.9kHz Fs=96kHz , ±0.2dB 0.5-45.9kHz |
Dynamic Range | 20-22kHz bandwidth 112dB 20-22kHz bandwidth and A weighting flter 115dB |
Output Noise | 20-22kHz, volume=0-90 -104dBu A weighting flter, volume = 0-90 -106dBu 20-22kHz, volume=90.5-99.5 -97dBu A weighting flter, volume = 90.5-99.5 -100dBu |
Crosstalk | 1kHz <98dB 20kHz <72dB |
Attenuation Range | 0 to -99dB, 0.5dB steps |
Channel Tracking Accuracy | +/-0.05dB |
Maximum Output Level | +18dBu |
Impedance | Headphone Output Impedance: 0.5Ω Control Room Output Module Line Output :47.5 Ohms |
Clocking and general | |
Supported Sample Rates | 44.1, 48, 88.2, 96, 176.4, 192 kHz |
External Clock Lock Range | FS ± 1.5% |
Intrinsic Jitter, 10Hz-20kHz BW | Internal Clock: < 40ps RMS External Clock: < 40ps RMS |
Jitter Rejection Corner Frequency | 500mHz |
Dimensions | 1U rack mount W16.75 x D10” |
Weight | 5.2lbs (2.3kg) |
Power Consumption | 90-250V~ 50-60Hz 25 Watts |
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