It seems ages ago so I will take your word for it but I really thought none of my Denons including the 4308 can do subwoofer when in pure direct. From memory, in pure direct it got really pure, no display no subwoofer no nothing, just L/R.
Again I'll take your words for it for now until I have a spare moment to check things out. Also, yours a 5308, that may be different, but I doubt it.
If he does get a sub woofer out, then its NOT pure direct unless anlog filtering is involved. Any digital extraction is DSP and is therefore not considered pure direct. I also believe that in its purest definition, pure direct only involves analog signals at the input. Feed a digital signal and some form of DSP is required to bring teh signal into the analog domain.
As an example, on my RX-V1800, when I use the analog outs of my bluray player and set the Yammy to pure direct, there is no way I can get the subwoofer added in. However, if using the HDMI connection, I can press Pure direct and I will be able to use the sub in conjunction with my speakers.
Pure direct eliminates all DSP only if the signal is analog. Any digital content will need to be put into the analog domain so its only "semi pure direct"
I know for a fact that on the Denon AVR-5308CI and AVP-A1HDCI you can get a subwoofer output in Pure Direct mode if you set the
2Ch/Direct setup to have a subwoofer and LFE+Main, instead of LFE+THX.
The only problem with that is the Main speakers get FULL RANGE.
Direct and Pure Direct modes will automatically set the main speakers to FULL RANGE, even if you set them to SMALL.
So the Subwoofer gets everything below the crossover point (20Hz-80Hz), but the main speakers gets 20Hz-20kHz. So there is some serious "double bass" between 20Hz-80Hz, unless your main speakers cannot play below "80Hz" or so.
I doubt that the Denon AVP-A1HDCI, which boasts as being the "only" pre-pro that is truly balanced from input-to-output for the "purist" sound, uses "Semi-Pure Direct".
If it says Pure Direct, then it is Pure Direct, not Half-Direct.
Denon homies don't play that.
I'm sure Gene can elaborate on the Pureness in the Pure Direct mode of the AVP-A1HDCI.
