From Grace Design

The Grace Design m701 is a modular, high channel count audio interface designed for professional and commercial recording facilities. As our first foray into a complete interface design, the goal was to provide our very highest quality AD/DA convertion integrated into a powerful, configurable platform. The m701’s modular design allows a wide array of configurations based on your needs. From simple in the box systems to large hybrid studios, the m701 is ready.

Modern Conversion

We have been building AD/DA conversion into our mic preamp and monitoring products since the early 2000’s. During this time, digital audio converter chips have achieved a very mature state. Today it is hard to find a bad converter chip. But building a complete audio product around any converter still requires careful and expert audio design skills, which we have been honing for decades. Analog input and output circuitry, power supply, and clock design matter more than ever, and are what differentiates a great sounding I/O device from the rest. The m701 furthers our legacy of open and musical sounding audio hardware with a remarkably powerful studio I/O tool.

Massive I/O Capability

Individual 8 channel ADC and DAC modules can be installed in any combination into the 8 available card slots, allowing for a wide array of I/O combinations based on the customer’s need. Digital I/O options include: two 32 channel module slots for Digilink, Dante, USB2 (upcoming), Ravenna/ AES67/ ST2110 and other future formats. A third option module slot is provided for expanding m701 digital I/O capabilities, such as an additional 24 channel AES3 I/O module, Word Clock distribution module, or future studio monitoring functionality. Included baseboard digital I/O connections are 8ch AES, 8ch ADAT and 2ch S/PDIF. Also, optional Grace Design high-quality 4ch microphone preamplifier modules can mounted in any of the 8 card slots.

GraceNet

Configuring and operating the m701 is done at either the front panel or via our GraceNet web-based control software. GraceNet is built-in and automatically works with any browser – there is no software to install or update. The home screens for both the front panel hardware and GraceNet display comprehensive metering views for all inputs and outputs, as well as give access to all configuration and setup functions. GraceNet even includes an integrated control interface for Grace Design m108 microphone preamplifiers.

Cue Mixing Built-in

A built-in 32×8 mixer allows for multiple low latency cue mixes in a tracking environment, with individual mixers made available to the artist via GraceNet and a personal device (phone or tablet).

Grace Design Reliability

The m701 main unit is a single 2U chassis engineered with a high-quality dual redundant power supply and ultra quiet fan to maximize reliability for hardworking recording facilities. The m701 is backed by a 5 year transferrable warranty on all parts and labor.

FEATURES

• 64 channel analog I/O
• 202 channel digital I/O
• Reference quality 8ch AD/DA modules
• Eight 8ch AD/DA option slots
• Digilink & Dante option modules
• Ravenna /AES67/ ST2110 option module
• 32×32 USB2 option module (upcoming)
• 24ch AES3 I/O option module
• Included I/O: 8ch ADAT, 8ch AES3, 2ch S/PDIF
• High performance 4ch microphone preamp option module
• Integrated control for Grace Design m108 mic preamplifiers
• GraceNet built-in Ethernet / web browser control
• Built-in 32×8 low latency cue mixer
• System workflow load, edit, save, and recall
• 5 year transferrable warranty

DA CONVERTER Option Fs=48kHz unless otherwise noted.
THD+N Ratio
-3dBFS In, +15dBu Out, 22Hz-22kHz BW <-115dB
-3dBFS In, +21dBu Out, 22Hz-22kHz BW <-110dB
Dynamic Range
20-22kHz bandwidth 123dB
20-22kHz bandwidth and A weighting filter 125dB
Intermodulation Distortion
SMTPE/DIN 4:1 50Hz, 7kHz, 1.0V Out <107dB
Frequency response +/-0.2dB -3dB
44.1kHz Fs DC-20.5kHz DC-20.6kHz
48kHz Fs DC-22.2kHz DC-23.5kHz
88.2kHz Fs DC-27kHz DC-43.2kHz
96kHz Fs DC-27kHz DC-47kHz
176.4kHz Fs DC-27kHz DC-85.5kHz
192kHz Fs DC-27kHz DC-92.7kHz
Output Level (selectable)
0dBFS +24dBu or +18dBu
Output Noise (+18dBu=0dBFS)
20-22kHz -105dBu
20-22kHz, A weighting filter -107dBu
Crosstalk
Interchannel crosstalk, 1kHz -123dB
Interchannel crosstalk, 10kHz -103dB
Level and Impedanc
Digital Trim Range -20 to +20dB, 0.1dB steps
Channel Tracking Accuracy +/-0.05dB
Maximum Output Level +18dBu or +24dBu
Output Impedance (balanced) 300Ω
A/D CONVERTER OPTION Fs=48kHz unless otherwise noted.
THD+N Ratio
1kHz, -1dBFS, 20Hz-22kHz < 0.0004% (-108dB)
Dynamic range
22Hz-24kHz, 48kHz >117dB
“A” weighted, 48kHz >120dB
Intermodulation Distortion
IMD SMPTE 4:1 60Hz, 7kHz, -3dBFS <0.002%
Frequency response +/-0.2dB -3dB
44.1kHz Fs 14Hz-20.6kHz 4.5Hz-21.1kHz
48kHz Fs 15Hz-22.4kHz 4.5Hz-23.0kHz
88.2kHz Fs 14.9Hz-41.1kHz 4.5Hz-42.3kHz
96kHz Fs 15Hz-44.7kHz 4.5Hz-46.1kHz
176.4kHz Fs 15.5Hz-79.6kHz 4.5Hz-88.09kHz
192kHz Fs 15Hz-86.7kHz 4.5Hz-95.97kHz
Full scale input level 0dBFS
Relay Selectable +18dBu or +24dBu
Crosstalk
Interchannel crosstalk, 1kHz -140dB
Interchannel crosstalk, 10kHz -127dB
Input Impedance
Balanced Input (DB25 or XLR) 20k Ω
MICROPHONE PREAMPLIFIER OPTION MODULE
Gain Range -6, +2-69B in 1dB steps
Sensitivity @ -6dB Gain +30dBu = 0dBFS
Sensitivity @ 69dB Gain -45dBu = 0dBFS
Dynamic Range
20-20kHz bandwidth, 14dB Gain >119dB
20-20kHz bandwidth and A weighting filter, 14dB Gain >122dB
Frequency Response
@ 40dB gain ± 0.2dB (50Ω source) 15Hz-300kHz
@ 40dB gain ± 3dB (50Ω source) 4.5Hz-1.0MHz
THD+N ratio
@ 20dB gain 0dBu in (-4dBFS), 1kHz <-104dB
@ 40dB gain -20dBu in (-4dBFS), 1kHz <-102dB
@ 60dB gain -40dBu in, (-4dBFS), 1kHz <-87dB
Intermodulation Distortion
@ 40dB gain +20dBu out
SMPTE/DIN 1:1 (50Hz, 7kHz) <.0010%
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
Crosstalk
Any Channel @ 40dB gain 1kHz -132dB
Any Channel @ 40dB gain 10kHz -122dB
CMRR
@ 60dB gain, +20dBu CM, 1kHz >95dB
@ 60dB gain, +20dBu CM, 10kHz >84dB
@ 60dB gain, +20dBu CM, 60Hz >70dB
Maximum Input Level
Balanced, 1kHz, -6dB Gain +30dBu (24.5Vrms)
Balanced, 1kHz, 69dB Gain -45dBu (4.3mVrms)
Impedance
Input: +48V On 8kΩ
Input: +48V Off, Ribbon Mode 20kΩ
Dynamic Range
20-20kHz bandwidth, 14dB Gain >119dB
20-20kHz bandwidth and A weighting filter, 14dB Gain >122dB
Channel Matching Accuracy
+/-0.05dB
CLOCKING
Supported Sample Rates kHz 44.1, 48, 88.2, 96, 176.4, 192
External Clock
Lock Range FS +/- 1%
Word Clock Input Voltage (BNC) 200mV-5.0V peak to peak
Word Clock Output voltage 5V peak to peak
Word Clock Input Impedance 48kΩ or 75Ω
Word Clock polarity Left data: High, Right data: Low

Intrinsic Jitter, 10Hz-20kHz BW

Internal Clock <40ps RMS
External Clock <40ps RMS
Jitter Rejection Corner Frequency 0.5Hz
GENERAL
System Latency, Linear Phase Filters 48kHz 96kHz 192kHz
ADC to Digital Output 0.5ms 0.25ms 0.12ms
Digital Input to DAC 0.8ms 0.4ms 0.2ms
System Latency, Minimum Phase Filters 48kHz 96kHz 192kHz
ADC to Digital Output 0.2ms 0.1ms 0.05ms
Digital Input to DAC 0.2ms 0.1ms 0.05ms
Cue Mixer Latency TBD TBD TBD
Network connection modes
dhcp, static, link-local 100Mbps RJ45
Mechanical Weight Dimensions
Audio Control Unit 6.8lbs (3.2kg) 19"W x 3.5" H x 10.9" L
Power Consumption
90-250V~ 50-60Hz 50W Max

Free 3-Year Warranty

Sound Pure stands behind our products. Free three-year warranty on this item. Coverage exclusions live in Terms & Conditions, Section 27.

Level of support and expertise that simply isn't available at big-box megastores. Read the warranty →

Returns

This item is not eligible for the Try-Before-You-Buy 48-hour audition. Standard return policy applies — see Terms & Conditions, Section 18 for details.

Sound Pure Studios Control Room A — Durham, NC

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