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Part# 11-11800
MFR Model# 11801


For Experimental / LSA / Non-Certified Aircraft only.

The PM500EX provides all basic intercom capabilities plus many of the most advanced features usually only found in more expensive models. Among the best features:
  • Individual output amplifiers for pilot, copilot, and passengers 1 and 2, giving enough audio punch to allow communications in very noisy environments.
  • Voice Operated Relay (VOX) circuitry prevents mic audio from getting through the intercom until someone speaks or triggers the VOX open switch.
  • Automatic fail-safe interconnect to the aircraft radio wires the pilot's headset to the aircraft radio in the event of disrupted power or related failure.
  • Input jack giving pilots and passengers the option to listen to music during flight. During intercom activity, a mute feature will allow communications without distraction. Note that radio reception will NOT mute the music.
  • Pilot isolate mode allows the pilot to communicate without interruption during critical phases of the flight while passengers talk and listen to music.
  • Separate pilot and copilot transmit capabilities ensures that only the person pressing the PTT will be heard over the radio.
With the PM500EX, you get years of trouble-free operation in a very inexpensive unit.


  • Input power: 12-28 Volts DC
  • Current Drain: < 70 mA: Externally fused at 1 Amp
  • Headphone Impedance: 150-1000 ΩTypical
  • Total audio power available: 225 mW
  • Aircraft Radio Impedance: 1000 Ω Typical
  • ±3 dB Mic Frequency Response: 350 Hz-6000 Hz
  • ±3 dB Music Frequency Response: 200 Hz - 15 kHz
  • Net weight: 8.5 Ounces (.340 kg)
  • Dimensions: 0.90" H X 2.60" W X 4.85" D
  • (2.2 cm x 6.6 cm x 12.3 cm)


  • PS Engineering requires all units to be sold with custom harness in order to maintain factory warranty. Units sold without harness will receive no factory warranty. All PS Engineering orders with custom wire harness are build to order and require all questions to be filled out to process correctly. Any custom order not complete will cause delays. All custom harnesses are built to IPC-WHMA-A-620 standards via the manufacturer’s installation manual. Any additional comments or special requests may be noted in the Special Instructions field at checkout for review by the avionics team. For questions regarding custom harnesses for PS Engineering please email or call us at 800-826-3160.
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Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Are the PM 500 EX and PM 501 essentially the same unit? If not, what are the differences? In the search, 501 and 500 EX have the same PN. Thank you alex

Yes, the PM 500EX is the new name for the PM 501. The FAA required this name change to clarify experimental use only.

Q: Whats the difference between PM 500 and 1000 II beside TSO? Im building an experimental so certification is not and issue

Per P.S Engineering: aside from one being for experimental aircraft the other is TSO, the key differences are:
1000 II comes with the Jack Kit and can be multiple box (expanded)
PM 500: No Jack Kit and can only be single box (not expandable)

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