The CPA 121 coach amplifier's outstanding three separate final stages for the driver and passengers provide 2 x 20 watts of power each. Besides the Professional Line consists of the CCU coach radio and control unit to control all the connected audio, video and navigation components and a cassette unit with integrated display (CCX) for displaying the selected sources and functions.

Coach Audio / Professional-Line
Amplifier
Power amplifier with three separate final stages, one for the driver and two for the passengers
Output power 6 x 20 watts sine
Inputs for 8 audio/video sources (radio, CC, CD, CDC 1 + 2, video/TV 1, video/TV 2 in connection with audio/video switch, navigation)
Inputs for 2 external audio frequency sources (D- or E-net telephone, driver warning system)
Audio output of telephone, driver warning system and navigation through driver's loudspeakers
Audio module for external source (navigation, telephone and drivers warning system)
Line-out for second amplifier
Volume for the second passenger area can be adjusted using the fader
Telephone mix (mute)
Power supply for CCX, CCU and D- or E-net telephone (12 V)
Power supply for video/DVD player, TV tuner, CDC (24 V)
MAS output for CDC 1 + 2 and video
Video and microphone relays
MC-Net via CAN
Stand-alone operation (replacement for BPA 24120)
Operating voltage: 24 V
Weight: 2,150 kg