Well, I changed a setting in the Denon called SOURCE DIRECT. The default is OFF. According to the manual, turning it on allows the output of the audio signals without adding speaker settings or channel level processing to the audio signals of DVD-A or SACD. Did so, and the sub seems ot be back. Will experiment some more (have not tried a DVD in this configuration, but I don't think this will affect digital settings. We'll see.

Tune in next week for another thrilling episode ...

Mike
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75" 4K HDR Sony XBR 75X95k mini-LED TV
Marantz AV7706 pre-pro
OPPO UDP 203 4K Ultra HD Blu-ray Player
Mirage HDT Speaker System (LCR [OM-5s for L&R and HDT-F for center], SR, SL, SBR, SBL [HDT-Rs])
Dual SVS PB12-Plus Subs
Outlaw Audio Model 7900 Power Amp w/Dual Emotiva CMX-2
AudioControl BijouTM THX� Equalizer
Rega RP1 Turntable
Dual Panamax M5300-PM Power Conditioners
Dual Monster Power HTS 2500 Power Conditioners
Dual Monster Power HDP 1800 Power Conditioners
Clearplay Blu-ray Player
Motorola VIP1200 HD cable receiver
Logitech Harmony Elite Remote