SPECIFICATIONS :
TSO Compliance:  TSO-C50c TSO-C35d
Dimensions:  Length behind panel: 6.4"; Rack width: 6.29"; Height: 1.3"
Power Requirements:  Supply voltage of 11-33 Vdc; Operating current of 2.2A (13.8V, speaker on)
Temperature Range:  -20C to +55C
Audio Panel:  3 transceiver inputs,5 receiver inputs,2 unswitched inputs,500 ohm input impedance,60db min input isolation
Intercom:  6 (pilot, copilot, 4 passengers) positions,3 (pilot, copilot, passengers) volume controls,2 (pilot, copilot/passengers) VOX level controls,6 (one per mic input) VOX circuits,2 (one input mutable) music inputs (Stereo),3 intercom isolation modes (pilot, crew, all) 
Headphone Outputs:  3 stereo (pilot, copilot, passengers) output amplifiers
Power: 100 mW per stereo channel, each headset, into 150 ohms with not more than 5% distortion, any normal supply voltage
100 Hz to 15 kHz nom music frequncy response
100 Hz to 6 kHz nom A/C radio frequency
Special cabin noise band de-emphasis on ICS mic
Speaker Outputs:  Outputs Selectable: 1 pilot selectable
Output Power: 10 watts into 4 or 8 ohms, any normal supply voltage
Frequency Response: 350 to 6 kHz nom
Special functions: PA Mode, pilot selectable