I have read the manual of the last big Denon pre-amplifier.

http://usa.denon.com/AVP-A1HDCI-OM-E_101A.pdf

Page 34, with an external analog signal :

Subwoofer Level
Set the subwoofer level for playback.
Select according to the player in use.
[Selectable items] 0dB +5dB +10dB +15dB
We recommend setting to “+15 dB”.

With these possibilities, it can manage correctly the 5.1 analog output of the BDP83 with every setup. If you let the player do the bass management, the needed LFE boost is +15db instead of +10db with no bass management.

Serge.

G68ADV + HD621 (dead)
2xBSS 366
LCR Yamaha DSR112
4 Surround Presonus Eris E8
1 JBL 4645C sub and 1 DIY sub with WGTI15 woofer (Crest Audio 8001 amplifier)
3D-Lab Dvd Master/Panasonic BDT700/Panasonic UB420
JVC X7900