Ps Engineering PM501

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The PM501 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 invery 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. With the PM501 , you get years of trouble-free operation in a very inexpensive unit. 
* TO DOWNLOAD THE INSTALLATION MANUAL, CLICK HERE
* TO DOWNLOAD THE WIRE DIAGRAM, CLICK HERE
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SPECIFICATIONS
Input Power: 12-28 Volts DC at <70mA
Headphone Impedence: 150-1000 Ohms typical Audio Distortion: <10% 75mW into 150 Ohms load
Output Power: 225mW (total available) Radio Impedence: 1000 Ohms typical
Dimensions: 2.60"W x 0.90"H x 4.85"D Weight: 8.5 ounces
Mic Freq. Response: (3 dB) 350Hz-6000Hz Music Freq. Response: (3 dB) 200Hz-15kHz