Electro-Voice MA 1212
 MA 1212 - Call for pricing - Power Amplifier
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The MA-1200 series of professional rackmount mixer/amplifiers are designed for larger background music/paging
and public address system installations where expandability and flexibility is the ticket.
These new units are exceptional values, loaded with features and are easy to install in a variety of system designs.
The Electro-Voice MA-1212 is a 120-watt, twelve-input mixer amplifier designed for commercial sound applications.
It features twelve separate input controls which can be used to adjust the level from any of 12 input sources.
Input channels 1-10 are designed to either be used as low-Z balance microphone or line level inputs.
The combination connector on inputs 1-10 permits use of either XLR or ¼" input connectors.
A signal appearing at either input 1 will automatically mute the other channels unless the mute function is defeated via a switch on the rear panel.
Inputs 11 and 12 are for auxiliary line-level sources such as tape or CD players.
Mono or stereo signals may be applied to inputs 11 or 12.
The left and right components of a stereo signal can be applied to the dual RCA phono jacks of these inputs and mixed together to drive the built-in monaural power amplifier.
A rear panel paging input with gain control is provided for the paging output of a telephone system.
An audio signal appearing at this input automatically mutes all other inputs.
A preamplifier output jack and power amplifier input jack permit the mixed output to be fed to an
external signal processor (graphic EQ or compressor), and then returned to the built-in amplifier.
The preamp output may be used to drive an additional power amp with its own set of speakers without interrupting the function of the built-in amplifier.
There is also a 24V DC power option to operate the unit off of a 24V emergency power source.
The speaker output is available at a barrier strip, which includes terminals for driving low impedance loudspeaker loads, as well as 25, 70.7 or 100 volt distributed systems.
Features
- 10 Balanced Mic or Line Inputs—All Available with 24V Phantom Power
- 2 Auxilary Stereo Summing Inputs with 4 Level Sensitivity Adjustment
- Balanced Line Level Output for Adding Additional Power Amplifiers
- 24V Powered Operation for Emergency Power Requirements
- Adjustable Level Telephone Paging Input
- Independently Adjustable Low Power Monitor Output
- Integrated “Rack Ears” Allow for Rack Mounting Without Additional Accessories
Architectural and Engineering Specifications
The mixer amplifier shall have twelve input channels, with individual mix gain controls.
Input channels 1 through 10 shall be configured for either low-Z balanced microphone operation or hi-Z line level signals via switches on the rear panel.
A signal present channel 1 shall trigger the muting of channels 2–12.
The mute circuit shall be defeatable using a switch on the rear panel.
Inputs 1–10 shall be available via combination female XLR / ¼" connectors.
Inputs 11 and 12 shall accept either mono or stereo sources.
If a stereo source is connected, it shall be properly mixed to mono via a resistor network mounted on the input plate.
There shall be a paging input that accepts a 600 ohm line-level feed from a phone system.
When a signal is present at the paging input, it shall automatically mute other input sources.
The paging input shall be equipped with its own gain control.
There shall be a master level control.
Separate bass and treble equalization controls shall be provided.
The mixer amplifier shall meet the following performance criteria:
output power shall be 120 watts;
total harmonic distortion shall be less than 1% at 1 kHz;
frequency response shall be within ±3 dB from 50 Hz to 15 kHz;
input impedance shall be 600 ohms (balanced inputs) or 47 kW (unbalanced inputs);
nominal load impedance shall be 4, 8 or 16 ohms for voice-coil-connected loudspeakers, 25, 70.7 or 100 volt nominal transformer windings for the constant-voltage output.
In addition to a preamplifier output/power amplifier input link, there shall also be a line-level balanced XLR output.
The mixer amplifier shall operate from either a standard 120V AC 50/60 Hz or a 24V DC power source, and measure 15.0 cm (5.9") high x 48.0 cm (18.9") wide x 32.0 cm (12.6") deep.
The net weight shall be 12.0 kg (26.5 lb).
The mixer amplifier shall be the Electro-Voice® model MA-1212.
| Specifications |
| Rated Output Power @ 1 kHz | 120 W |
| Frequency Response (±3 dB, ref. 1 kHz/1 W) | 50 Hz–15 kHz |
| THD @ rated power | < 1% |
| Signal to Noise Ratio (Mic/Aux/Paging/Power Amp In) | > 52 dB / > 65 dB / > 65 dB / > 90 dB |
| Input Sensitivity | Impedance |
| Inputs 1-10 Mic Setting - balanced | 0.3 mV | 600 Ω |
| Inputs 1-10 Line Setting - balanced | 75 mV | 47 kΩ |
| Paging - transformer isolated | -20 dBm | 600 Ω |
| Power Amp In - unbalanced | 1 V | 10 kΩ |
| Auxiliary - unbalanced | 100 mV to 1 V | - |
| Line Output Level | Impedance |
| Preamp Output - unbalanced | 1 V | 1 kΩ |
| Balanced Line Output - unbalanced | 500 mV | 47 kΩ |
| Speaker Outputs | 25, 70.7, 100-Volt | 4, 8, 16 Ω |
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| Tone Controls (Bass/Treble/Muting) | ±10 dB at 100 Hz / ±10 dB at 10 kHz / 40 dB attenuation |
| Protection | 3 independent Slo-Blo® fuses, primary AC and DC |
| Power Dissipation | 390 W |
| Power Requirement | 108-132V AC, 50/60 Hz |
| Dimensions (HxWxD) | 15.0 x 48.0 x 32.0 cm (5.9" x 18.9" x 12.6") |
| Weight | 12.0 kg (26.5 lbs) |
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MA Series Brochure (pdf)