One annoying thing though – the Beo4 does not seem to have ‘L-A.Aux’ available as an extra button, so I would not be able to select that source using my Beo4 on my Beolab 3500. It has L-V.Aux but not L-A.Aux. What a strange omission!
If using link commands (L-etc) frequently, you could put a Beo4 in permanent link mode and then simply use A.AUX.
To set in permanent LINK mode:
Standby + List together
Press List till CONFIG appears
Enter 2002, the display should read LINK ON
Press Exit
Repeat the above process to return the Beo4 to normal mode.
EDIT: The later Beo4 NAVI (with the little joystick) may well have L-A.AUX as an option – it is listed in the Lexicon.