D-901 Digital Mixer – Modular DSP Solution for Installed Sound Systems
The TOA D-901 Digital Mixer is a versatile and modular DSP solution, perfect for installed sound applications such as audio/visual systems, houses of worship, conference centers, and multi-zone venues. Supporting up to 12 mic/line inputs and 8 line outputs, the D-901 offers full input-to-output matrixing for complete signal routing flexibility. Advanced audio processing features include automixing, feedback suppression, parametric EQ, compression, limiting, gating, crossovers, delays, and more. Control is simple via RS-232, contact closure, front panel programming, or off-site configuration using PC software. With robust functionality, remote control options, and a 5-year warranty, the D-901 delivers unmatched performance and reliability in demanding audio environments.
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Power Source
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100 - 120 V, 230 V AC, 50/60 Hz
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Power Consumption
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40 W
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Frequency Response
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20 - 20,000 Hz, ±1 dB (+4 dB* input)
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Input
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Max. 12 channels, modular construction (modules optional)
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Output
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Max. 8 channels, modular construction (modules optional)
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Feedback Suppression Function
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12 filters (auto/dynamic)
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Auto-Mixing Function
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Ducker (automatic muting), NOM attenuation
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Auto-Mixing Group
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4 groups
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Equalizer/Filter
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Parametric equalizer: 20-20,000 Hz, ±15 dB, Q: 0.267-69.249
Filtering: High-pass filter 20 - 20,000 Hz, 6 dB/oct, 12 dB/oct
Low-pass filter 20 - 20,000 Hz, 6 dB/oct, 12 dB/oct
Notch filter 20 - 20,000 Hz, Q: 8.651 - 69.249
All-pass filter 20 - 20,000 Hz, Q: 0.267 - 69.249
High shelving filter 6 - 20 kHz, ±15 dB
Low shelving filter 20 - 500 Hz, ±15 dB
Horn equalizer 20 kHz, 0 to +18 dB (1 dB steps)
Crossover filter: 20 - 20,000 Hz,
6 dB/oct, 12 dB/oct, 18 dB/oct, 24 dB/oct
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Compressor/Auto-Leveler
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(Compressor mode)
Threshold: -20 to +20 dB (1 dB steps)
Ratio: 1:1, 2:1, 3:1, 4:1, 8:1, 12:1, 20:1, ∞ :1
Attack time: 0.2 ms - 5 s
Release time: 10 ms to 5 s
Gain: -∞ to +10 dB
(Auto-leveler mode)
Target level: -20 to +10 dB (1 dB steps)
Maximum gain: 0 to +20 dB (1 dB steps)
Attack time: 10 ms - 10 s
Release time: 100 ms to 10 s
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Delay
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Delay time: 0 - 682.6 ms (0.021 ms steps)
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Matrix
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12 × 8
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Crosspoint Gain
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-∞ to 0 dB (1 dB steps)
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Preset Memory
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16
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Auxiliary Function
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System Locking function
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Control
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RS-232C, D-sub connector (9 pins), Remote control module (option)
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Front Panel Section
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Preset memory recall key: 8
LCD screen, screen shift key (up/down/left/right), setting knob
Input level indicator: Dual color LED
Output level indicator: Dual color LED
Channel selector key: 12 (input channel selection)
8 (output channel selection)
Channel volume control: 1 (input channel selection)
1 (output channel selection)
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Rear Panel
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Input module slot: 6 (input/output module slot: 2)
Output module slot: 2
Remote control module slot: 1
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Operating Temperature
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+5℃ to +40℃
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Finish
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Panel: Aluminum, hair-line finish, black
Others: Pre-coated steel plate, black, 30% gloss
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Dimensions
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482.6 (W) × 132.6 (H) × 320 (D) mm (excluding projection)
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Weight
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6.9 kg
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Accessory
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Power cord (2 m) ……1, Rack mounting screw ……4,
Rack mounting bracket (preinstalled on the unit) ……2,
Module mounting screw (spare) ……4,
Blank panel (preinstalled on the module slot) ……9
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