Story ID: 344
AEM Debuts Low-impedance Audio Router
By: Amy Wilder
Caption: Router supports low-impedance headsets for military operations
Word Count: 244
Canadian avionics manufacturer Anodyne Electronics Manufacturing (AEM) has launched a low-impedance router for its P139-HD Digital Audio System to support military and special-mission aircraft applications.
P139-HD is a modular audio platform providing centralized control and routing for aircraft audio signals. The platform handles audio to and from transceivers, receivers, headsets, recorders, and other audio sources, including intercom routing, Bluetooth devices, and multiple talk groups.
The router supports headsets at 5-ohm and 8-ohm impedance levels. It has eight headset ports, 10 transceivers with 18 receive-only channels, and 12 keylines for special functions or mission-equipment control. The unit includes a 25-watt speaker driver and routes and mixes aircraft audio from all sources controlled by connected control panels.
Used by law enforcement and special-mission operators, the system can now accommodate additional military and intelligence, surveillance, and reconnaissance aircraft.
AEM sales and marketing director Tony Weller said the company received regular requests from aircraft integrators and military operators involved in training and ISR applications for a dedicated low-impedance system. 
In February, AEM introduced the MTP138 VHF FM panel-mount radio for special-mission platforms. The narrowband and wideband transceiver operates in the 138-MHz to 174-MHz frequency band and was developed in consultation with offshore, air medical, search-and-rescue, coast guard, and forest service operators. The radio can be converted to a Project 25 digital transceiver and supports 40 zones and 5,000 channels. AEM is evaluating regional STCs for popular aircraft models.