Mono Multi-room speakers using stereo receiver
This type of speaker setup is brand new for me, so sorry if I'm asking silly questions.
Is it possible to combine L and R stereo channels on a Sony str-dh740 to provide a single mono output?
The house we just moved into has a multi-room speaker setup. There are four rooms each with two speakers and a dial for each room's volume control. The speaker input, however, has only a single pair of pos/neg terminals (that's literally one pair - one pos, one neg - which drive ALL of the house speakers). I own a Sony str-dh740 and was able to get the speakers working by connecting one of the Front L/R speaker outputs to the house speaker input or the pos of one and neg of the other, but of course I am only able to hear either the L or R channel through each pair of speakers.
I'm trying to understand how I can run both the L and R channels into that single speaker input so I hear the combined L/R sound.
I looked through the manual, but didn't really find what anything that described how to do this. I've also read in various places that not all receivers can do this and I cannot find any kind of suitable adapter for sale.
Any suggestions would be greatly appreciated.