TOA 900 Series Amplifier A-903MK2 (USED)
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TOA 900 Series Amplifier A-903MK2 (USED)
Our Notes: In very good condition. The "Input 8" knob is missing. There are also some marks/scratches due to normal use.
The A-903MK2 Mixer Power Amplifier controls and mixes up to eight independent input signals. The Mixer Power Amplifier delivers up to 30 watts of output power. Optional plug-in modules are available for use with mixer power amplifier to provide versatility for a wide range of operating applications.
Product Specs:
| BRAND | TOA |
|---|---|
| SERIES | 900 |
| MODEL | A-903MK2 |
| TYPE | 8-channel mixer power amplifier |
| POWER SOURCE | AC mains, 120 V, 60 Hz |
| POWER CONSUMPTION | 60 W |
| OUTPUT POWER | 30 W RMS |
| POWER BANDWIDTH | (D) 20 to 20,000 Hz, 0.5% THD, (T) 50 to 20,000 Hz, 0.5% THD |
| FREQUENCY RESPONSE | (D) 20 to 20,000 Hz, ±1 dB (T) 20 to 15,000 Hz, ±1 dB, (T) 20 to 20,000 Hz, +1 dB, -3 dB |
| TOTAL HARMONIC DISTORTION | 0.02% at 1 kHz, rated output |
| INPUT | Eight Input Ports : Each port accepts any input modules. One Bridging Input/Output |
| INPUT SENSITVITY/IMPEDANCE | Input Port #1 to #8 : 100 mV/10 kΩ Bridging Input/Output : 100 mV/3.3 kΩ |
| PREAMP OUT/POWER AMP IN | 1000 mV into 600 Ω/1000 mV, 10 kΩ |
| OUTPUTS (T)=TRANSFORMER, (D)=DIRECT | Main (T) : 4 Ω, 25 and 70 volts, balanced, Main (D) : 8 Ω, unbalanced Aux : 10 kΩ, 1 V |
| OUTPUT REGULATION (1kHz) | (D) Less than 0.5 dB, no load to full load (T) Less than 1.0 dB, no load to full load |
| SIGNAL TO NOISE RATIO | Master volume min : 90 dB Master volume max : 77 dB Power amplifier only : 105 dB |
| TONE CONTROL | Bass : ±10 dB at 100 Hz, Treble : ±10 dB at 10 kHz |
| CONTROL | 8 Input gain control 1 Master gain control 1 Bass control 1 Treble control 1 Power ON/OFF switch 1 Tone defeat switch 1 Low-Cut switch (60 Hz, 6 dB/octave) |
| INDICATOR | 1 Power LED, 1 Protect LED, 1 Signal LED, 1 Normal LED, 1 Peak LED |
| PROTECTION | Self-protection, with AC fuse (inside) |
| CONNECTOR | Input No.1 to No.8 : Card-edge connector Bridging, Mixer preamp. output, Power amp. input, Aux output : RCA phono jack Output : Screw-terminal strip Mute, Remote VR : Screw-terminal strip AC outlet : 3-pin grounding type AC power cord/plug : SJT, 3-prong type |
| OPERATING TEMPERATURE | -10 °C to +60°C (12 °F to 140 °F) |
| FINISH | Black |
| DIMENSIONS | 420(16.54") x 99.1(3.90") x 318(12.52") mm |
| WEIGHT | 7.8 kg (17.20 lb.) |