Item # A-912MK2 UL
8-INPUT MODULAR 120W MIXER AMPLIFIER, 8 MODULE PORTS, 25V/70V/8OHM SPEAKER OUTPUTS, 2RU

Item # A-912MK2 UL
8-INPUT MODULAR 120W MIXER AMPLIFIER, 8 MODULE PORTS, 25V/70V/8OHM SPEAKER OUTPUTS, 2RU
- UM: EA
- Estimated Weight: 33.0
- Brand: TOA ELECTRONICS
The TOA A-912MK2 is a high-quality 8-channel mixer power amplifier designed for professional distributed sound systems in commercial and institutional settings. Delivering 120W of output power, the A-912MK2 features eight modular input slots compatible with a wide range of TOA plug-in modules (sold separately), allowing complete customization for microphones, music sources, paging, and other audio inputs. Engineered for flexibility and reliability, it includes bass/treble tone controls, master volume, and automatic muting functions. The rugged chassis and convection cooling ensure quiet, long-term performance in schools, churches, offices, and retail environments. Ideal for integrators seeking a dependable and configurable audio solution, the A-912MK2 supports both 25V/70V distributed systems and 4-ohm speaker connections.
The TOA 900 Series are widely recognized as the industry standard in installed sound system amplification. When reliability and performance are critical - such as in paging and music distribution for airport, hospital, and industrial sound systems - you can count on the TOA 900 Series to perform consistently, day-in and day-out.
Features
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High Performance
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The A-903MK2 (30 W), A-906MK2 (60 W) and A-912MK2 (120 W) Modular Mixer/Amplifiers are engineered for high performance with wide frequency response, very low noise and distortion, and excellent output regulation.
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Modular Design
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Eight module slots allow you to easily configure custom configurations choosing from over fifty TOA plug-in modules with an extensive array of features and connector types. You can increase the input capacity by connecting a second mixer or mixer/amplifier to the rear-panel Bridge In/Out jack.
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Versatile Features
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Outputs include transformer isolated 25 V, 70 V and 8 ohm (A-903MK2: 4 ohm) plus a direct low-impedance mode if non-transformer operation is required. Multiple paging priorities are easily configured using optional mute-type modules activated by external switch-closure or mute-send modules. Pre-Out/Power-In jacks allow connection of external signal processing between the mixer and amplifier sections. Other features include protection circuitry, auxiliary output, bass/treble controls and remote master volume terminals. The 900 Series Mixer/Amplifiers are UL and cUL Listed and carry a five year warranty
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Type |
8-channel mixer power amplifier |
Power Requirement |
AC mains, 120 V, 60 Hz |
Power Consumption |
180 W |
Output Power |
120 W RMS |
Power Band Width |
(D) 20 ~ 20,000 Hz, 0.5% THD, (T) 50 ~ 20,000 Hz, 0.5% THD |
Frequency Response |
(D) 20 ~ 20,000 Hz, ±1 dB |
T.H.D |
0.02% at 1 kHz, rated output |
Inputs |
Eight Input Ports : Each port accepts any input modules. |
Input Sensitivity /Impedance |
Input Port #1 to #8 : 100 mV/10 kO |
Preamp OUT /Power Amp IN |
1000 mV into 600 O/1000 mV, 10 kO |
Outputs(T)=Transformer (D)=Direct |
Main (T) : 8 O, 25 and 70 volts, balanced, Main (D) : 4 O, unbalanced |
Output Regulation (1 kHz) |
(D) Less than 0.5 dB, no load to full load |
S/N Ratio(Band Pass 20 ~ 20,000 Hz) Tone defeat switch on |
Master volume min : 90 dB |
Tone Controls |
Bass : ±10 dB at 100 Hz, Treble : ±10 dB at 10 kHz |
Controls |
8 Input gain control 1 Master gain control 1 Bass control |
Indicators |
1 Power LED, 1 Protect LED, 1 Signal LED, 1 Normal LED, 1 Peak LED |
Protection |
Self-protection, with AC fuse (inside) |
Connectors |
Input No.1 to No.8 : Card-edge connector |
Temperature Range |
-10°C ~ +60°C (12°F ~ 140°F) |
Finish |
Black |
Dimensions(W×H×D) |
420(16.54") × 99.1(3.90") × 358(14.09") mm |
Weight |
11.4 kg (25.13 lb.) |
Accessories |
Volume control cover (YA-920)……4 |
Option |
Rack mounting bracket (MB-25B) |
Documents