I have the Denon AVP-A1HDCI.
Wow, I thought PD shuts off subs, but I just compared PD vs Direct vs Stereo, setting my Sub to LFE + Main & 80Hz XO. And it actually outputs subs just like Stereo 2.2. Yes!
I guess on the AVP-A1, Pure Direct bypasses the tone control circuits and video circuits, but actually still allows sub outputs.
So from now on, I will be using Pure Direct 2.2 on my AVP-A1HD.
My Denon 3312 does NOT allow this. PD/D shuts off any sub outputs so I thought my AVP-A1 would do the same. But I was wrong.
I just did some testing to see if I knew what I was talking about.
And I almost did
Sure enough, Pure Direct sends bass to the subs when you LFE + Main using the HDMI, COAX, and XLR inputs.
It does not using the 7.1 analog in. It is easy to get confused because you cannot tell what input you have selected.
At least, I do
I do find improved sound stage using Pure Direct, so it turns something else off too.
IMO, It is complete non-sense that turning off the LCD display improves sound.
However, the turning off the Video circuitry does alter the sound (Including setting the Video Mode: Game).
I do not need any video processing since the output of the 8801 goes to a Lumagen Mini which has a 125 point calibration for my display.
These are subtle but I have used the my IPAD and my web interface to change it on the fly.
If you enter the Output setting while no in Pure Direct mode, you can change to Pure Direct mode and the web controls work.
You cannot enter when you are already in PD mode.
Again, I think this is a marketing feature.
Of course, there should be no change in the audio as a result of the video.
There should be no special modes to disable them to improve the sound.
If it does, it means that the product is not as well designed as it should be.
However, IMO there is. So I turn it all off.
With everything else off, just changing the Video mode from Auto to Game resulting is 1 watt reduction in the power use.
That is not a big deal, I just mention it because it proves that something less is occurring in the Video processing chip.
Perhaps they put that copper plate in the wrong place
- Rich