Radio Headphone Amplifiers (High Line System)

Radio headphone amplifiers (high line system)
The rear mounted radio headphone amplifiers are located in the lower rear quarter trim casing and are held in position by a clip on the side of the headphone amplifier. Mode and function buttons are located on a control panel, the mode button allows each of the rear seat passengers to independently select from the radio, tape or CD-autochanger. The driver and the rear seat passengers can each listen to any of the audio devices they select. However the radio cassette setting has overall priority e.g:
^ If the radio cassette is using a radio wave band (AM or FM), the headphone user will be able to select the cassette tracks or CD-autochanger. The user will be able to listen to same radio band that is selected on the radio cassette, but will not be able to change the station selected.
^ If the radio cassette has CD-autochanger selected, the headphone amplifiers will allow listening to the compact disk but will not allow track changes. The headphone user will be able to select on all of the radio bands or cassette tracks.
^ If the radio cassette has tape selected, the headphone amplifiers will allow listening to the tape but will not allow track changes. The headphone user will be able to select all radio bands or CD's on the CD-autochanger.

If one headphone amplifier unit has control of the tape player, CD or radio, the other headphone amplifier will be able to listen and be able to change tape tracks or radio bands. Other buttons allow a search seek function of radio band or compact disk track, reversal of the tape, radio station and volume adjustment depending on the current operating mode. If one radio headphone amplifier has control of the radio, tape or CD autochanger the other radio headphone amplifier is able to change the track or radio band selected. A headphone socket with a glow ring is located on the control panel. When a headphone is turned on , a 'headphone-module active' signal is sent to the radio cassette player. The design incorporates panel illumination and a glow-ring to locate the socket in low light conditions. To control the audio output from the radio headphone amplifiers, signals are sent to and received from the radio cassette player.