MCM Electronics

40W PA AmplifierMCM Part #: 555-3188  |  Pyramid Part #: PA205

40W PA Amplifier 2.3 stars from 2 reviews.
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40 Watt PA Amplifier
Compact public address mixer/amplifier accepts two mic and one auxiliary/phono input, provides 120W max output and will drive 4/8/16ohm and 70V loads.

Product Description

  • Individual level controls for Mic1, Mic2 and phono/aux inputs
  • Master three band equalizer
  • Rear panel phono/aux selector for line level, or magnetic phono level sources
  • Master level control
  • 12 segment LED bar graph output meter
  • Quick push speaker connections
  • 70V output for compatibility with distributed audio systems
  • Detachable IEC type AC power cord
  • Unswitched convenience AC outlet
  • Mix bus connection for daisy chaining multiple amplifiers


  • Power output: 40W/120W RMS/max
  • THD: 1%
  • Frequency response: 80Hz ~ 20KHz
  • Equalizer frequencies: 100Hz, 1KHz and 8KHz
  • Input sensitivity: 2.5mV (mic), 150mV (aux), 3.5mV (phono)
  • Power requirements: 120/240VAC, 50/50Hz
  • Dimensions: 3.3" (H) x 12.75"(W) x 8.9"(D)
  • Mfr. #PA205

  • Product Reviews

    • "555-3188 - 40W PA Amplifier" by twttwt on 12/16/2014
      Overall: 1 out of 5

      I have purchased two of these in the past year. The first one was tested in my shop before installation. It had a loud whine after being on for about two minutes. MCM did a pickup and credit for this unit.

      I purchased another unit, tested and installed it and it developed the same problem in about 4 months. I returned it to Pyramid for warranty repair. I had to pay shipping both ways. When it was returned to me, I hooked it up in my shop and it started making the whining noise after about an hour. I called the repair center and they said if I would pay return shipping they would pay to ship the unit back to me. That will mean I have paid $40 total in shipping for warranty repair.

    • "40 watt PA AMP" by Roy Salthouse on 7/12/2012
      Overall: 3.5 out of 5

      This item arrived not completely assembled. The led bar was not in the opening in the cabinet but flopping around inside! I had to remove the cover and add the two screws that were missing to fasten the led circuit board in its proper position. This amp will be installed this weekend in my church. I hope it works. The quality appears good but I question the workmanship. Roy

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    Package Specifications & Dimensions
    Weight:10.13 lbs.
    Warranty:365 days
    Need to Return?
    Length:15 in.
    Width:11.5 in.
    Height:5 in.
    Shipping Information
    Extra Shipping Charge:No
    Drop Ship:No
    Catalog Pages

    MCM Cat 57, Page 134

    MCM Cat 56, Page 147

    PDF Reference

    Requires Adobe Acrobat Reader.

    Mfr. Info

    Pyramid Logo
    Mfr. Name:Pyramid
    Mfr. Part Number:PA205
    Save at least 15% on all Tenma Test Equipment through Sunday. Use promo code EMC396.
    Save at least 15% on all Tenma Test Equipment through Sunday. Use promo code EMC396.