Biamp MA120 120W Single-Channel Mixing Amplifier – Powerful and Intuitive Audio Control
The Biamp MA120 is a 120-watt single-channel mixing amplifier designed for professional audio applications that require both high performance and ease of use. Featuring intuitive front panel volume and microphone controls with clear visual feedback, the MA120 simplifies system operation for installers and users alike.
Equipped with four priority audio routing levels—including a dedicated emergency input with mute-all functionality, paging microphone input with contact closure and chime, two mic/line inputs with 48V phantom power, and four mono-summed stereo line inputs—the MA120 offers versatile audio management. Its efficient Class D amplifier topology supports 4Ω and 70V/100V outputs and ensures fanless, silent operation. The unit is rack-mountable and compliant with CE, UL, and RoHS standards, making it a reliable choice for conference rooms, houses of worship, retail environments, and more.
Key Features
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120W continuous power, single-channel output
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Supports low impedance (4Ω) and constant voltage (70V/100V) operation
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Class D amplifier for high efficiency and reliability
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Four priority levels for audio routing including emergency and paging inputs
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Two mic/line inputs with 48V phantom power and four stereo inputs
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Dedicated emergency input with mute-all override switch
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Paging mic input with contact closure and chime
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Fanless design for silent operation
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Intuitive front and rear panel controls
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Rack mountable (2RU) with internal universal power supply
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CE marked, UL listed, and RoHS compliant
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5-year manufacturer’s 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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