The MA120 is a 120W single-channel mixing amplifier. Designed for ease of use, the front panel of the MA120 includes volume and microphone controls, providing immediate visual feedback regarding system operation. The MA120 is equipped with four priority levels for audio routing: one emergency input, one paging input, two mic/line inputs, and four stereo line, mono-summed inputs. Its audio performance, ease of use, and versatile feature set make the MA120 ideal for a variety of professional audio applications.
Biamp MA120 Features
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Single channel; 120 watts of continuous power
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Supports 4Ω and 70V/100V outputs
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Class D amplifier topology
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Intuitive front and rear panels
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Four priority levels for audio routing
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24V priority output overrides local volume controls
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Dedicated emergency input with mute all switch
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Paging mic input with contact closure and chime
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Two mic/line level inputs with 48V phantom power
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Four stereo inputs
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Fanless operation
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Internal universal power supply
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Auto standby mode
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Rack mountable (2RU)
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CE marked, UL listed, and RoHS compliant
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5-year warranty
Biamp MA120 Specifications
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GENERAL
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Height
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3.5 inches (89 mm)
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Width
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19 inches (483 mm)
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Depth
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11.8 inches (300 mm)
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Weight
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11.0 lbs (5.0 kg)
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ENVIRONMENTAL
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Ambient Operating Temperature Range
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32 - 95° F (0 – 35° C)
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Humidity
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0-95% relative humidity (non-condensing)
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Altitude
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0-6,600 ft (0-2000m) MSL
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CONTROLS & INDICATORS
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Control
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Chime: Yes
Tone Control: Yes
Wall Panel Controls: Yes
VOX Mute: Yes
Music Level Control: Yes
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Front Panel Indicator(s)
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Front Panel Indicators: Signal present, clipping, emergency mode active, paging active, VOX active
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AUDIO
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Microphone
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Paging Mic
Nominal Input Sensitivity (Bal. Mic): -45 dBV (5.6 mVrms)
THD+N (Pre-Out, @ -6dB): < 0.4%
Frequency Response (-3dB):
Balanced Mic: 165 Hz – 20 kHz
Unbalanced, Balanced Line: 20 Hz – 20 kHz
Gain: -15 to +15 dB
Chime Length: 2 sec
Input Impedance: 2 kΩ
Mic A, B
Nominal Input Sensitivity:
Balanced Mic: -45 dBV (5.6 mVrms)
Balanced Line: -12 dBV (250 mVrms)
Unbalanced Line: -12 dBV (250 mVrms)
THD+N (Pre-Out, @ -6dB): < 0.2%
Frequency Response (-3dB):
Balanced Mic: 165 Hz – 20 kHz
Unbalanced, Balanced Line: 20 Hz – 20 kHz
Phantom Power (balanced only): +48VDC (7mA/input)
VOX Attenuation (Mic A, B, Inputs 1-4): 30 dB
Input Impedance: 2 kΩ
Inputs 1-4
Nominal Input Sensitivity (Unbal. Line): -12 dBV (250 mVrms)
THD+N (Pre-Out, @ -6dB): < 0.1%
Frequency Response (-3dB): 20 Hz – 20 kHz
Input Impedance: 10 kΩ
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Microphone
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Paging Mic
Nominal Input Sensitivity (Bal. Mic): -45 dBV (5.6 mVrms)
THD+N (Pre-Out, @ -6dB): < 0.4%
Frequency Response (-3dB):
Balanced Mic: 165 Hz – 20 kHz
Unbalanced, Balanced Line: 20 Hz – 20 kHz
Gain: -15 to +15 dB
Chime Length: 2 sec
Input Impedance: 2 kΩ
Mic A, B
Nominal Input Sensitivity:
Balanced Mic: -45 dBV (5.6 mVrms)
Balanced Line: -12 dBV (250 mVrms)
Unbalanced Line: -12 dBV (250 mVrms)
THD+N (Pre-Out, @ -6dB): < 0.2%
Frequency Response (-3dB):
Balanced Mic: 165 Hz – 20 kHz
Unbalanced, Balanced Line: 20 Hz – 20 kHz
Phantom Power (balanced only): +48VDC (7mA/input)
VOX Attenuation (Mic A, B, Inputs 1-4): 30 dB
Input Impedance: 2 kΩ
Inputs 1-4
Nominal Input Sensitivity (Unbal. Line): -12 dBV (250 mVrms)
THD+N (Pre-Out, @ -6dB): < 0.1%
Frequency Response (-3dB): 20 Hz – 20 kHz
Input Impedance: 10 kΩ
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Input Type
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INPUTS
Number of Inputs
Emergency (line level with contact): 1
Paging Mic (mic level with contact): 1
Mic/Line (balanced): 2
Stereo Line (unbalanced): 4
Input Priority Levels: 4
Priority Input Contact: Yes
Emergency Input
Nominal Input Sensitivity: 0 dBV (1 Vrms)
Emergency Input
Nominal Input Sensitivity: 0 dBV (1 Vrms)
THD+N (Pre-Out, @ -6dB): < 0.5%
Frequency Response (-3dB): 45 Hz – 20 kHz
Input Impedance: 5 kΩ
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Impedance
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5 kΩ
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Maximum Output
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OUTPUTS
Number of Output Channels: 1
Output Connectors: 4-pin, 0.3 inch (7.6 mm) Euroblock
70V/100V Mode: Yes
Low Impedance Mode: Yes
Priority Output Contact: Yes
Minimum Operational Load: 4Ω
Amplifier
Topology: Class D
RMS Output Power (1% THD): 120 W
Dynamic Power: 150 W
SNR (1% THD): > 90 dB
THD+N (@ -6dB): < 0.5%
Protection: Temperature, overcurrent,
overvoltage, undervoltage
Priority Output
Voltage: 24V
Max Current: 0.5A
Pre-Out
Nominal Output Level: 0 dBV
Standby
Wakeup Sensitivity:
Inputs 1-4: -43 dBV (6 mVrms ± 10%)
Mic A, B (RCA): -50 dBV (5 mVrms ± 10%)
Mic A, B (Balanced, VOX off): -74 dBV (0.3 mVrms ± 10%)
Time to Auto Standby: 10 min
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COMPLIANCE
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Certifications
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FCC Part 15B (USA)
UL listed (USA and Canada)
CE Marked (Europe)
RoHS Directive (Europe)
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