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Toa Electronics A-912MK2 120W 8-Channel Modular Mixer/Amplifier

Used Cat #3231629 • MFR #A-912MK2 UL
4 reviews
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Toa Electronics A-912MK2 120W 8-Channel Modular Mixer/Amplifier
This image is for illustrative purposes only
Key Features
  • For Background Music, Paging, On-Hold
  • For Education, Transportation, Medical
  • 8 Slots for Line or Mic Input Modules
  • 4/8 Ohms & 25/70V Operation
From the TOA 900 series of mixer/amplifiers, the A-912MK2 is a customizable unit ideal for background music, paging, on-hold messages, and other applications in hospitals, airports, schools, and other similar venues. The A-912MK2 is designed for high performance with a low self-noise, a wide frequency response, and excellent output regulation. This 120W unit features 8 input channels that accept any combination of TOA's plug-in modules for ultimate customizability. The front panel features a master volume control and individual channel volume controls as well as bass and treble controls.
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Toa Electronics A-912MK2 UL Overview

From the TOA 900 series of mixer/amplifiers, the A-912MK2 is a customizable unit ideal for background music, paging, on-hold messages, and other applications in hospitals, airports, schools, and other similar venues. The A-912MK2 is designed for high performance with a low self-noise, a wide frequency response, and excellent output regulation. This 120W unit features 8 input channels that accept any combination of TOA's plug-in modules for ultimate customizability. The front panel features a master volume control and individual channel volume controls as well as bass and treble controls.

Input capacity may be increased by connecting another mixer or mixer/amplifier to the bridge in/out jack. The unit features transformer-isolated outputs, and a direct output mode if non-transformer operation is desired.

Modular Input Design
Eight expansion input slots house modules that provide line or microphone level connections.
25 and 70 Volt Operation
The mixer/amplifier is capable of 70V operation, suitable for long speaker runs throughout offices, airports, hospitals, restaurants, etc.
Paging Priority Modes
A Dual Mute Bus permits multiple levels of paging priority, using optional mute-type modules.
External Mute Terminals
Accommodate external mute switchers for remote mute operation.
Remote Master Volume Terminals
Enable remote master volume control.
Low-Cut Filter
A master low-cut filter switch eliminates low-frequency noise and rumble.
Auxiliary Output
The auxiliary output accommodates an external recording device, mixer, and more.
Insert Jacks
Insert jacks accommodate outboard signal processing.
Delayed Power Up
A power up delay feature protects the outputs and connected speakers from damage caused by surges during abrupt amplifier power up.

Toa Electronics A-912MK2 UL Specs

Key Specs
Number of Channels
8
Amplifier Power Rating
120 W
Audio I/O
1x RCA Unbalanced Aux Output
Digital Audio I/O
No
Network I/O
No
USB I/O
No
Amplifier
Output Power
120W
Form Factor/Type
Tabletop (Rack-Mountable with Optional Hardware)
Damping Factor
Not Specified by Manufacturer
Input Sensitivity
Module Inputs: Varies According to Installed Modules
Bridging Input: 100mV
Input Impedance
Module Inputs: Varies According to Installed Modules
Bridging Input: 3.3 k ohms
Number of Channels
8
Gain
Not Specified by Manufacturer
Amplifier Power Rating
120 W
Frequency Response
20Hz - 20kHz
Signal-to-Noise Ratio
Not Specified by Manufacturer
Total Harmonic Distortion (THD)
0.02%
Performance
Input Connections
8 x Input Module Slots
1 x RCA Bridging In/Out
Protections
Overload, Power-On Delay, Short Circuit, Thermal
Output Connectors
8 ohm, 25V, and 70V Balanced Screw Connectors
4 ohm Unbalanced Screw Connector
RCA Aux Output
Frequency Response
20 Hz to 20 kHz
Controls Front Panel
Power Button, Master Volume Control, Individual Channel Volume Controls, Bass and Treble Controls, Low Cut Switch, and Tone Defeat Switch
Input Sensitivity
Bridging:
100 mV
Controls (Rear)
Mode Switch
Indicators
Signal, Normal, Peak, Power, and Protect LEDs on Front Panel
Cooling
Not Specified by Manufacturer
I/O Impedance
Bridging Input:
3.3 Kilohms
Power Consumption
180W
Dimensions
16.5 x 3.9 x 14.1" (419 x 99 x 358 mm)
Weight
25.1 lbs (11.4 kg)
Specialties
Delayed Output Connection at Power On
Protection Circuitry for Overload, Overheating, and Short Circuit
Rear-Panel AC Outlet for Powering External Device
SNR
105 dB (Power Amp Only)
THD
0.02%
Signal Processing
EQ
2-Band
Filters
High-Pass
Connectivity
Audio I/O
1x RCA Unbalanced Aux Output
Digital Audio I/O
No
Network I/O
No
Other I/O
1x RCA Bridging In/Out
Speaker Outputs
1x Barrier Strip Balanced 8-Ohm/25 V/70 V
1x Barrier Strip Unbalanced 4-Ohm
Number of Module Slots
8
USB I/O
No
Media/Memory Card Slot
No
Power
AC Input Power
120 VAC, 50 / 60 Hz
Power Consumption
180 W
AC Outlet
120 VAC / 500 W Max Load / 4 A Max Draw (Unswitched)
Physical
Display & Indicators
1x LED (Signal)
1x LED (Status)
1x LED (Protect)
Operating Conditions
12 to 140°F / -11 to 60°C 
Dimensions
16.5 x 3.9 x 14.1" / 419.0 x 99.0 x 358.0 mm
Weight
25.1 lb / 11.4 kg

Toa Electronics A-912MK2 UL Reviews

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