09 and before the US Pro Radios were programmable for either option. People reprogram the L7 setup for Hi Fi so they can hook
up there analog input amps here pretty often. Its described in the following thread and in the coding sub forum
http://www.e90post.com/forums/showthread.php?t=641323
also new and interesting
http://www.e90post.com/forums/showthread.php?t=687463
http://www.e90post.com/forums/showth...ighlight=radio