The Model 240 passenger speaker amplifier is a remote-controlled unit that is operated from switches and potentiometers located in the cockpit or cabin of the aircraft. This unit receives audio from various sources to send to speakers located in the cabin. The Model 240 provides stereo music to the cabin from external music sources. This passenger audio amplifier also provides fasten seat belt and no smoking chime tones, cabin call ring tone, ADF, pilot selection Com (PSC), TV, Briefer and cabin paging audio to the cabin speakers.

• "Fasten seat belt" and "no smoking" sign chime tones
• Cabin call ringer tone, ADF, PCS, TV, paging audio to cabin speakers
• Electronically switched
• Manual cockpit switches enable electronic switches in the 240 amp
• Paging and briefer audio priority
• Microphone bias current available for PA microphone input