MPA 152 Plus

MPA 152 Plus

1. Provide a compact, energy efficient audio power amplifier that shall support three analog stereo inputs and one amplified stereo output or two mono analog outputs with 15 watts rms per channel.
   1. Compact stereo amplifier with 15 watts rms power output per channel, Ecofficient Level 3 qualification, and stereo or dual mono operation.
      1. Input Requirements
         1. Shall support one stereo, balanced or unbalanced signal on one 5-pole, 3.5 mm captive screw connector
         2. Shall support one stereo, unbalanced signal on one pair of RCA connectors
         3. Shall support one stereo, unbalanced signal on one 3.5 mm stereo mini jack
         4. Shall provide individual buffering for each input
         5. Shall provide stereo input summing of all inputs into a single stereo signal
         6. Shall provide summing of left and right channels, and route the resulting mono signal to both outputs when dual mono output is selected
      2. Output Requirements
         1. Shall support one stereo speaker level signal or two mono speaker level signals on one 4-pole, 5 mm captive screw connector
         2. Shall provide a total of 30 watts rms output power with 15 watts rms per channel into 4 ohms or 8 watts per channel into 8 ohms measured at 1 kHz with 1% THD
         3. Shall provide a signal-to-noise ratio of 90 dB measured from 20 Hz to 20 kHz, +1/-3 dB, at 8 ohms
         4. Shall provide a THD+N measurement of less than 0.1% measured at 1 kHz, at 8 ohms and 3 dB below clipping
         5. Shall provide damping factor of greater than 100 at 8 ohms
      3. Amplifier Requirements
         1. Shall utilize an efficient Class D amplifier design
         2. Shall provide Class D Ripple Suppression technology
         3. Shall be convection cooled and operate without fans or vents
         4. Shall provide an automatic clip limiter to detect onset of clipping by comparing input and output waveforms and automatically reduce gain without audible artifacts to eliminate clipping distortion
      4. Power Requirements
         1. Shall draw 7.3 watts during typical (1/8) power operation with both output channels driven with 4 ohm loads
         2. In conjunction with power supply, shall draw 3.1 watts during typical (1/8 power) operation with both output channels driven with 4 ohm loads
         3. Shall draw 3.1 watts during quiescent operation
         4. In conjunction with power supply, shall draw 3.8 watts during quiescent operation
         5. Shall provide a low power standby mode
            1. Shall enter standby mode after 25 minutes (+/- 5 minutes) of inactivity
            2. Shall draw less than 1 watt while in standby mode
            3. Shall return to full power status in less than one second upon signal detection while in standby mode
            4. Shall feature an input signal detection threshold of -53 dBV, +/- 3 dB on unbalanced RCA and 3.5 mm stereo mini jack inputs to deactivate standby mode
            5. Shall feature an input signal detection threshold of -46 dBu, +/- 3 dB on balanced captive screw connector input to deactivate standby mode
            6. Shall provide a defeatable auto standby timer and retain Ecofficient Level 3 capabilities
         6. Shall meet Ecofficient Level 3 requirements
         7. Shall provide energy-efficient external universal power supply with 2-pole captive screw connector
            1. Shall be universal in-line power supply with IEC power socket and support for international 100-240 VAC, 50/60 Hz standards
            2. Shall provide output of 12 VDC, 2 A, 24 watts
            3. Shall support use of optional Extron ZipClip™ 200 mounting bracket
            4. Shall meet energy efficiency level V and bear the UL Environment Energy Efficiency Certification (EEC) Mark
      5. Control Requirements
         1. Shall support remote control of volume and muting on 3-pole, 3.5 mm captive screw connector using optional Extron analog volume and mute controllers
      6. Front Panel Requirements
         1. Shall provide an LED for power indication that lights green when the unit is receiving power and active, and lights amber when the unit is in standby mode
         2. Shall provide a recessed switch for toggling between stereo or dual mono output modes
         3. Shall provide potentiometers for bass, treble, and input level adjustment
      7. Rear Panel Requirements
         1. Shall provide one input on one 5-pole, 3.5 mm captive screw connector
         2. Shall provide one input on one pair of RCA connectors
         3. Shall provide one input on one 3.5 mm stereo mini jack
         4. Shall provide one output on one 4-pole, 5 mm captive screw connector
         5. Shall provide remote volume and mute control port on one 3-pole, 3.5 mm captive screw connector
      8. General Requirements
         1. Shall be enclosed in a rack-mountable 1U, quarter rack width metal enclosure
         2. Shall meet regulatory compliances
            1. Shall meet safety compliances under CE, c-UL, and UL
            2. Shall be UL rated for use in plenum airspaces and meet UL 2043 compliance for heat and smoke release, excluding the power supply
            3. Shall meet UL 60065 for safety
            4. Shall meet EMI/EMC compliances under CE, C-tick, FCC Class B, ICES, and VCCI
            5. Shall comply with appropriate requirements of CEC, EU code of conduct, RoHS, and WEEE
         3. Shall provide three year parts and labor warranty
   2. Approved device shall be the Extron MPA 152 Plus, part number 60-844-03; no alternates or equals.