I have a pre/pro that when playing 2-channel analog playback will not allow the the sub to play when the fronts are set to the 'Large' setting. In the digital movie formats it gives me the choice of Large and Small with the sub on but once I use the 2-channel mode the sub won't play if I set the front setting to Large.

Does anyone know of a configuration using the ICBM that would help me? I'm using a amp/preamp setup to give you an idea of my options.

Thanks