As no-one has jumped in, I'm going to try.

Best to talk about specific devices:

- Sooloos doesn't use MHR so it will output unencrypted 24/96 if you allow it to upsample.
- The 808.3 and 818 are a bit more unclear, and someone who has actually done it will have to jump in. The manuals say they can apply "optional MHR" to high-speed output. But at the same time input which is already encoded in MHR (i.e. from an HD621 run in stereo - covering your BD/DVD question) will have to stay in MHR if it is going to stay high-speed.

So if you switch MHR off on an 808.3/818 then high-speed signals fed in with MHR will be down sampled on output, but high-speed signals fed in without MHR will not be down sampled on output, if I understand correctly.

Can't think of another source device which has an SL output. There is no DVD/BD player with SL output, nor does the HD621 have it.

Is that the sort of thing you mean?

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