Today i was playing with the EXT in of the 5803 connect with the 555es SACD player using 5.1 analog out and Left right analog out to a CD analog input. I set the EXT1 to DSP (to active bass management for EXT1 in). And I test with a 2 ch. SACD in direct or pure direct mode with EXT1, i find out no subwoofer activity at all. then i switch to CD input (analog) with direct and PureDirect mode my sub is alive. (i know that sub can be switch to off in these mode but i choose to leave it on). Then i switch back to EXT1 and try different dSP mode like stereo, 7 ch stereo, widecreen etc.. the sub come alive but i don't want any DSP effect on SACD material. i somehome hit on the dobly button, now with EXT1 the sub also come alive but without apply any DSP effect at all, not even Dobly prologic or prologic II. on the display it only show MULTI IN 1, (no direct, stereo, or dobly etc....) I find out it is so weir, and retest the above many time the result is the same. i came to a conclusion that the DIRECT mode and PURE DIRECT mode on the EXT input is REALLY PURE DIRECT it basspass all the bass management (even i activate it for the EXT input). Is is different than the direct and pure direct mode of the L & R analog input . and when you want to use bass management for the EXT input without any DSP effect you have to press the dobly button (may be other) to activation the bass management for EXT input. NOT DIRECT OR PURE DIRECT mode. Any Denon 5803 owner could you confirm this weirness of the EXT input bass management of the 5803. I am scratching my head rightnow.