MPA 401 Retired

Mono 70/100 V Amplifier - 40 Watts
Key Features
  • 40 watts rms output power:
    MPA 401-70V - 1 x 40 watts @ 70 volts
    MPA 401-100V - 1 x 40 watts @ 100 volts
  • ENERGY STAR® qualified amplifier
  • Extron Patented CDRS™ - Class D Ripple Suppression
  • Bass, treble, and input level controls
  • UL 2043 plenum rated
  • Balanced and unbalanced buffered audio inputs
The Extron MPA 401
Model Version Description Part #
MPA 401-70V 70 V Mono Amp - 40 Watts 60-845-01 Retired
MPA 401-100V 100 V Mono Amp - 40 Watts 60-845-11 Retired

This product has been retired.
Suggested Replacement
MPA 601

The Extron MPA 401 is a quarter rack width, convection-cooled mono amplifier delivering 40 watts rms output power. This UL 2043, plenum rated design meets UL requirements for in-ceiling installations. The MPA 401 is an ENERGY STAR® qualified amplifier with an Extron exclusive, highly efficient, advanced Class D amplifier design. It also features patented CDRS™ - Class D Ripple Suppression technology that provides a smooth, clean audio waveform and an improvement in signal fidelity over conventional Class D amplifiers. Three buffered inputs are available so three separate sources can be connected without altering performance. The Extron exclusive, high efficiency design generates very little heat and allows the amplifier to be convection cooled and operate in environments with little or no ventilation.

Energy Efficient Amplifier with Auto Power-Down

The MPA 401 ENERGY STAR qualified amplifier is an energy efficient product that conserves energy and reduces costs. With an auto power-down feature that automatically places the amplifier into standby after 25 minutes of inactivity, it consumes just 8 watts when idle and less than 1 watt in standby mode.

The MPA 401 is housed in a compact 1U, quarter rack width enclosure. This amplifier is UL 2043 plenum rated, allowing for a concealed installation above a drop ceiling to prevent theft while providing convenient placement of AV equipment.

The MPA 401 delivers 40 watts rms for high impedance speaker systems in voice reinforcement and distributed audio applications. The MPA 401 is available in 70 volt and 100 volt models.

The MPA 401 accepts balanced and unbalanced stereo or mono input signals. The front panel includes detented controls for bass, treble, and input level. The MPA 401 combines the left and right channels into a single mono output. An advanced, automatic clip limiter protects speakers from clipping distortion. For applications requiring volume adjustment and muting control from a location other than the amplifier, remote control capability is available using the optional Extron VCM 100 or VCM 200 analog volume and mute controller or VC 50 analog volume controller.


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MPA 401 Series
   Voltage gain 
      MPA 401-70V 
         RCA and TRS inputs 222x (47 dB)
         Captive screw input 57x (35 dB)
      MPA 401-100V 
         RCA and TRS inputs 317x (50 dB)
         Captive screw input 81x (38 dB)
   CMRR 75 dB (typical) @ 1 kHz
   Bass adjustment ±10 dB @ 100 Hz
   Treble adjustment ±10 dB @ 10 kHz
Audio input
   Number/signal type 1 stereo/mono, balanced/unbalanced input
2 stereo/mono, unbalanced inputs
(The three inputs are individually buffered and mixed together.  Stereo signals are actively summed into a mono signal.)
   Connectors (1) 3.5 mm captive screw connector, 5 pole (main input)
(1) 3.5 mm mini audio jack (tip, ring, sleeve)
1 pair RCA
   Impedance >10k ohms balanced/unbalanced, DC coupled
   Maximum level +20 dBu (balanced, captive screw) or +4 dBV (unbalanced, RCA/TRS) at 1% THD+N
   Input sensitivity 
      RCA and TRS inputs -10 dBV
      Captive screw input +4 dBu if driven by one input
-2 dBu if both inputs are summed
   Input signal detection threshold RCA and mini audio jacks: -44 dBv ±3 dB, unbalanced
Captive screw connector: -30 dBu ±3 dB, balanced
    NOTE     0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu
Audio output
   Number/signal type 
      MPA 401-70V 1 single channel (mono) 70 V
      MPA 401-100V 1 single channel (mono) 100 V
   Connectors (1) 5 mm screw lock captive screw connector, 2 pole
   Load impedance 
      MPA 401-70V 125 ohms minimum
      MPA 401-100V 250 ohms minimum
   Frequency response 80 Hz to 20 kHz, +1 dB/-3 dB, 1 watt
   THD + Noise <0.2% @ 1 kHz at 3 dB below clipping
   S/N >75 dB, 20 Hz to 20 kHz, unweighted
   Damping factor >100
   High pass filter 80 Hz, 12 dB/octave roll off
   Amplifier type Class D
   Output power 
      MPA 401-70V 40 watts (rms), 70 V, 1 kHz, 1% THD
      MPA 401-100V 40 watts (rms), 100 V, 1 kHz, 1% THD
Communications — amplifier
   Control port (1) 3.5 mm captive screw connector, 3 pole
   Pin configuration Pin 1 = +10 VDC (50 mA max.), pin 2 = volume/mute control (variable voltage), pin 3 = GND
   Volume control voltage range 0 V (mute) to 10 V (maximum volume)
   Power supply External
Input: 100-240 VAC, 50-60 Hz
Output: 12 VDC, 3 A, 36 watts
   Power consumption 
      Typical (1/8 power), MPA 401-70V 
         Device 11.0 watts, 125 ohm load
         Device and power supply 13.9 watts, 125 ohm load
      Typical (1/8 power), MPA 401-100V 
         Device 12.3 watts, 250 ohm load
         Device and power supply 15.3 watts, 250 ohm load
      Quiescent, MPA 401-70V 
         Device 4.6 watts
         Device and power supply 7.1 watts
      Quiescent, MPA 401-100V 
         Device 5.9 watts
         Device and power supply 8.4 watts
      Standby <1 watt (triggered after 25 minutes [±5 minutes] with no signal)
   Temperature/humidity Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, noncondensing
   Cooling Convection, no vents
   Thermal dissipation 
         Device and power supply <1 watt (3 BTU/hr)
      Idle, MPA 401-70V 
         Device 4.6 watts (16 BTU/hr)
         Device and power supply 7.1 watts (24 BTU/hr)
      Idle, MPA 401-100V 
         Device 5.9 watts (20 BTU/hr)
         Device and power supply 8.4 watts (29 BTU/hr)
      1/8 power, MPA 401-70V 
         Device 6.0 watts (20 BTU/hr)
         Device and power supply 7.1 watts (24 BTU/hr)
      1/8 power, MPA 401-100V 
         Device 7.3 watts (25 BTU/hr)
         Device and power supply 10.3 watts (35 BTU/hr)
      Rack mount Yes, with optional 1U rack shelf or back of rack mounting kit
      Furniture mount Yes, with optional under-desk mounting kit
      Pole mount Yes, with optional pole mounting kit
   Enclosure type Metal
   Enclosure dimensions 1.7" H x 4.3" W x 6.0" D (1U high, quarter rack wide)
(4.3 cm H x 10.9 cm W x 15.2 cm D)
(Depth excludes connectors.)
   Product weight 0.6 lbs (0.3 kg)
   Shipping weight 3 lbs (2 kg)
   Vibration ISTA 1A in carton (International Safe Transit Association)
   Regulatory compliance 
      Safety UL rated for use in plenum airspaces: meets UL 2043 for heat and smoke release, excluding the power supply; meets UL 60065 and IEC 60065 for AV equipment safety.
         MPA 401-70V CCC, CE, c-UL, UL
         MPA 401-100V CE, c-UL, UL
      EMI/EMC CE, C-tick, FCC Class B, ICES Class B, KCC, VCCI
      Environmental Complies with the appropriate requirements of CEC, ENERGY STAR® (ENERGY STAR® qualified amplifier), EU code of conduct, RoHS, WEEE
   Warranty 3 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.


Application Diagram

Panel Drawing

Panel Drawing
© 2020 Extron. Specifications are subject to change without notice.