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.
High Performance
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.
Modular Design
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.
Versatile Features
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.
| Type | 8-channel mixer power amplifier |
|---|---|
| Power Requirement | AC mains, 120 V, 60 Hz |
| Power Consumption | 60 W |
| Output Power | 30 W RMS |
| Power Bandwidth | (D) 20 - 20k Hz, 0.5% THD (T) 50 - 20k Hz, 0.5% THD |
| Frequency Response | (D) 20 - 20k Hz, ±1 dB (T) 20 - 15k Hz, ±1 dB (T) 20 - 20k Hz, +1 dB / -3 dB |
| Total Harmonic Distortion | 0.02% at 1k Hz, rated output |
| Inputs | 8 input ports: every port accepts any input module 1 Bridging Input/Output |
| Input Sensitivity& Impedance | Input Port #1 to #8: 100 mV/10 k Ohms Bridging Input/ Output: 100 mV/ 3.3 k Ohms |
| Pre-amp. Out/Power Amp. In | 1000 mV into 600 Ohms / 1000 mV, 10 k Ohms |
| Outputs ((T)=Transformer(D)=Direct) | Main (T): 4 Ohms, 25 V & 70 V, balanced Main (D): 8 Ohms, unbalanced Aux: 1 V, 10 k Ohms |
| Output Regulation(1k Hz) | (D): Less than 0.5 dB, no load to full load (T): Less than 1.0 dB, no load to full load |
| S/N Ratio (Band Pass: 20 - 20k Hz,with Tone defeat switch on) | Master volume set to min.: 90 dB Master volume set to max.: 77 dB Power amplifier only: 105 dB |
| Tone Controls | Bass: ±10 dB at 100 Hz Treble: ±10 dB at 10k Hz |
| Indicators | 1 Power LED, 1 Protect LED, 1 Signal LED, 1 Normal LED, 1 Peak LED |
| Protection | Self-protection, with internal AC fuse (inside) |
| Temperature Range | 12° F to 140° F (-10° C to +60° C) |
| Dimensions (H x W x D) | 3.9" (99.1 mm) x 16.54" (420 mm) x 12.52" (318 mm) |
| Weight | 17.2 lbs (7.8 kg) |
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
