TOA A-903MK2 / A-906MK2 / A-912MK2 Modular Mixer Amplifiers – Customizable & High-Performance

The TOA A-903MK2 (30W), A-906MK2 (60W), and A-912MK2 (120W) modular mixer/amplifiers are designed for high-performance audio distribution, offering wide frequency response, low distortion, and excellent output regulation. These flexible units include eight module slots for full customization with TOA plug-in modules, making them ideal for paging, background/foreground music, and music-on-hold applications in commercial environments.

Each model supports 25V, 70V, and 8Ω transformer-isolated outputs (A-903MK2 includes 4Ω), plus direct low-impedance mode. Features include dual mute bus for paging priority, remote volume control, Pre-Out/Power-In jacks for signal processing, and Bridge In/Out for system expansion. With TOA’s legendary reliability, UL/cUL listing, and a 5-year warranty, these amps are built for demanding installations in retail, office, worship, and educational settings.

TOA A-903MK2 Specifications

Type 8-channel mixer power amplifier
Power Requirement AC mains, 120 V, 60 Hz
Power Consumption 60 W
Output Power 30 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) 20 〜 15,000 Hz, ±1 dB, (T) 20 〜 20,000 Hz, +1 dB, -3 dB
T.H.D 0.02% at 1 kHz, rated output
Inputs Eight Input Ports : Each port accepts any input modules.
One Bridging Input/Output
Input Sensitivity /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
S/N Ratio(Band Pass 20 〜 20,000 Hz) Tone defeat switch on Master volume min : 90 dB
Master volume max : 77 dB
Power amplifier only : 105 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
1 Treble control 1 Power ON/OFF switch 1 Tone defeat switch
1 Low-Cut switch (60 Hz, 6 dB/octave)
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
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
Temperature Range -10℃ 〜 +60℃ (12゜F 〜 140゜F)
Finish Black
Dimensions(W×H×D) 420(16.54") × 99.1(3.90") × 318(12.52") mm
Weight 7.8 kg (17.20 lb.)
Accessories Volume control cover (YA-920)……4
Option Rack mouting bracket (MB-25B)

 

List price: $726.00
Price: $586.00