Originally Posted by voriand
The bass management circuitry is not turned off in pure direct mode unless you set the sub woofer to off.
The bass management is bypassed for both Direct and Pure Direct Modes (full range signals are sent to the front channels) but for Pure Direct the Denon's also generate an Analog filtered signal which is sent to the sub. You can of course switch this off if you want.
If your source is Analog then Pure Direct will give you 100% Analog bypass. If the source is Digital and you select Pure Direct then the Amp doubles up the DAC's to four per channel as well as generating sub output (which again is defeatable).
Here's a bit more info which I got from Denon about their modes:-
"Stereo with an analogue input, stays analogue as it passes through an analogue High-Pass Filter (if the speakers are configured to small) while a seperate but parallel signal goes to the DSP for Low-Pass filtering. In DIRECT Mode the Hi-Pass Filter is bypassed, while the digital Low-Pass is still active. In PURE DIRECT Mode, both the analogue High-Pass and digital Low-Pass are bypassed, however an analogue Low-Pass takes over, so in PURE DIRECT it is 100% analogue"
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