GRACE DESIGN m908
PRICE ON ENQUIRY
GRACE DESIGN m908 stereo to immersive monitor controller for up to 24 speakers: AD / DA, 288 bands of room EQ, bass management, web UI. Available in India from Shivansh Electronics, Kolkata, West Bengal, India.
VISUAL GUIDE — See Every Photo, Spec & Setup Step (PDF)
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DA control room outputs (48 kHz)
| THD+N, 0 dBFS in, +18 dBu out | < -115 dB |
| Dynamic range / A‑weighted | 123 dB / 125 dB |
| Output level 0 dBFS | +18 dBu |
| Output noise / A‑weighted | -105 dBu / -107 dBu |
| Crosstalk 1 kHz / 10 kHz | -123 dB / -103 dB |
| Attenuation range | 0 to -99 dB, 0.5 dB steps |
| Channel tracking | ±0.05 dB |
| Output impedance (balanced) | 300 Ω |
AD converter option (48 kHz)
| THD+N 1 kHz, -1 dBFS | < 0.0004 % |
| Dynamic range / A‑weighted | > 117 dB / > 120 dB |
| Full scale input | +20 dBu or +24 dBu (jumper) |
| Input impedance balanced / unbalanced | 20 kΩ / 10 kΩ |
Processing
| Room EQ | Up to 12 bands per channel, 288 total; 10 Hz - 20 kHz; Q 0.02‑50 |
| Bass management crossover | 25‑150 Hz, 6 / 12 / 18 / 24 dB/octave |
| Speaker channel delay | 0‑250 ms, 0.01 ms steps |
| DIM / mono sum | -30 to 0 dB / -9 to 0 dB |
| Latency AD in to DA out | 4.7 ms at 48 kHz; 1.2 ms at 192 kHz |
Headphones, clock and general
| Headphone max. output, 32 Ω | +19.2 dBu, 1.57 W; 1.3 Ω output impedance |
| Sample rates | 44.1‑192 kHz, 24 bit |
| Intrinsic jitter | < 40 ps RMS |
| ACU | 19 x 3.5 x 10.9 in (2U); 3.2 kg |
| RCU | 10.5 x 2.5 x 5.1 in; 1.0 kg |
| PSU | 8.5 x 1.7 x 8.2 in; 1.2 kg |
| Power | 90‑250 V, 50‑60 Hz, 50 W max. |
Product overview
The GRACE DESIGN m908 is a stereo, surround and immersive reference monitor controller for speaker systems up to 24 channels, with latest generation AD / DA converters, a 24 channel DSP for room correction and bass management, a remote control unit and an embedded web UI.
Built on GRACE DESIGN's legacy of reference audio design, the m908 delivers impeccable clarity and detail. The system consists of a mainframe audio control unit, a remote control unit based on the m905 but scaled up for the added features and channel count, and a power supply with dual-redundant universal input power modules. It is fully self contained and plug and play, so professionals and facilities can update their workflows for immersive playback with a minimum of effort and cost.
| Speaker channels | 24 |
| Digital input channels | 68 |
| Bands of room EQ | 288 |
| DA dynamic range, A‑wtd | 125 dB |
Key features
- Standard digital inputs: 24 ch AES3, 16 ch ADAT, 24 ch USB, AES3, S/PDIF and optical stereo inputs
- Outputs: 24 ch AES3, 16 ch balanced analogue, 24 ch USB 2
- Optional 8 channel ADC modules for up to 16 analogue inputs
- Option slot: network audio, interface or AES67 / ST 2110 module for 32 more channels of I/O
- 12 bands of parametric room correction EQ on every channel (288 bands); 64-bit fixed-point filters
- Complete bass management, channel level and delay calibration, comprehensive downmix control
- 4th generation s-Lock PLL; built-in SPL meter; reference headphone amplifier with crossfeed
- Flexible talkback, up to 8 stereo CUE paths, 4 GPIO; dual redundant external power supply
Web UI for control and setup
Enter the m908's IP address in a browser on the same network and the embedded platform loads with nothing to install: every monitoring control, all setup menus, click and drag room EQ with copy and paste, solo / mute speaker groups and matrix routing. Room EQ settings import and export as .csv files, and a link-local connection gives direct access over one network cable.
Room tuning
Firmware 2.x adds a graphical frequency / gain EQ window, slope controls for shelving filters, an offset trim for the bass management low-pass filters and channel delay with one sample resolution.
In the box
- Audio control unit (ACU)
- Remote control unit (RCU)
- A140 dual redundant power supply unit (PSU)
GRACE DESIGN m908: frequently asked questions
How many speakers can it control?
Speaker systems up to 24 channels: custom formats, immersive layouts up to 14.2.6, surround formats, 2.1, stereo and mono.
Does it have analogue inputs?
Optionally: 8 channel ADC modules give 8 or 16 analogue inputs, plus optional 2 channel XLR, RCA and RIAA phono inputs.
How much room EQ is available?
Up to 12 bands per channel on all 24 outputs, 288 bands at any sample rate.
Can it be controlled from a computer?
Yes, from the embedded web UI in any browser on the same network, in sync with the RCU.
Where can I buy the GRACE DESIGN m908 in India?
The GRACE DESIGN m908 is available from Shivansh Electronics, Kolkata, West Bengal, India, with delivery across India.
Workflow 1: Immersive mix room
Facilities moving to immersive playback.
Connections
| Connect | To |
|---|---|
| Recording system outputs | AES3 / USB / option module inputs |
| CR outputs | Up to 24 speakers |
Setup
- Define the speaker format.
- Route inputs in the matrix.
- Calibrate level and delay per channel.
- Set bass management.
Tip: Custom formats up to 24 channels are supported.
Workflow 2: Room correction
Studios tuning their rooms.
Connections
| Connect | To |
|---|---|
| Web UI | m908 network port |
Setup
- Open the web UI.
- Enter or drag EQ points per channel.
- Copy and paste between speakers.
- Export the room EQ as .csv.
Tip: Up to 12 bands per channel, 288 in total.
Workflow 3: Stereo and surround comparison
Mix engineers checking translation.
Connections
| Connect | To |
|---|---|
| Formats | Downmix control |
Setup
- Monitor the full format.
- Switch downmixes such as 7.1 to 5.1 or Lo/Ro.
- Use mono and L-R.
- Compare levels.
Tip: Comprehensive downmix control is built in.
Workflow 4: Tracking with cue mixes
Studios recording artists.
Connections
| Connect | To |
|---|---|
| CUE outputs | Headphone feeds |
| Talkback mic | RCU or ACU input |
Setup
- Create up to 8 stereo cue paths.
- Set each cue level.
- Assign talkback routing.
- Talk to the artists.
Tip: Talkback can be triggered from the RCU, a footswitch, user buttons or GPIO.
Workflow 5: Analogue sources
Rooms with analogue playback (ADC option).
Connections
| Connect | To |
|---|---|
| Analogue sources | 8 channel ADC module DB25 |
Setup
- Fit the ADC module(s).
- Route the analogue inputs.
- Set full scale +20 or +24 dBu.
- Monitor.
Tip: Two ADC modules give 16 analogue inputs.
Workflow 6: Facility integration
Larger facilities.
Connections
| Connect | To |
|---|---|
| Option slot | Network audio, interface or AES67 / ST 2110 module |
| GPIO | External systems |
Setup
- Install the option module.
- Route its 32 channels.
- Wire GPIO tallies.
- Store setups.
Tip: The option slot adds 32 channels of I/O.
