Well, let's say that it's not the only "strange" model 950 user interface feature.

I must admit, though, this one surprised me. I can't even think of a way that digital surround modes would affect the 6 channel "bypass" input.

Could it be possible that your SACD player's test tone is too high a frequency, and being cut out by the sub's LPF? Or perhaps it's not loud enough to be easily heard. The 950's sub test tone is very hard to hear in my system.

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Matthew J. Hill
matt@idsi.net