Rotel & 7.1: mono rears?

[Kevin C Brown]

I thought this was the case, but someone else thinks otherwise...

Thanks!

[Kevin D]

Nope. Rotel uses some processing to arrive at 4 channels of sound for the rear. You can do it mono if you wish, the setup menu has a selection of 1 or 2 center rear speakers.

Kevin D.

[Kevin C Brown]

Kevin (!) D- You may have mis-intepreted:

Surrounds plus rears for 7.1. Surrounds always have the 2 discrete channels from DD or DTS for example. But in xS mode, what ends up in the rears?

I thought it was a single channel derived from the surrounds (doesn't matter, 1 or 2 rears, for 2 it's mono).

But a person I know says it's more like the Denon receivers: in a 7.1 config in xS mode with 2 rears, that the left surround is replicated into the left rear, and the right surround is replicated into the right rear. For 1 rear channel, it's a mono channel derived from both surrounds.

??

[Andrew Pratt]

According to Rotel the rears in a 7.1 system running Rotels XS processing is in quasi stereo ...ie its not mono but its not a true stereo type mode either...and a lot depends on the material...clear enough :LOL:

[Kevin C Brown]

> quasi stereo

Thanks Andrew. I did not know that. Maybe similar to THX Ultra2 where they use decorrelation to make the 2 channels a little bit different. Put them slightly out of phase with each other or something.