UPDATE:

976 Remote still having volume control issues...have not tried duplicating with Amp and TV off...but when time allows, will attempt it...


Received and set up, IR only devices, on my Harmony Remote 950. All turning on via "Activity" programming. So far, no volume issues...stay tuned...
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Outlaw Model 976 AV Surround Processor
Outlaw Model 5000 5 Channel Amplifier
JBL Studio 590 Left and Right
JBL Studio 520C Center
2 JBL Sub 550P
Polk 265RT 3 Way Surrounds (in wall)
Sony Bravia 77" Class - A80CJ Series - 4K UHD OLED TV
Panasonic DP-UB820-K 4K Player
Technics SL 1210 GR (2019)
Ray Samuels F-117 Nighthawk - Phono Preamp
Ortofon Bronze 2M; Ortofon Headshell;Emmeline Nighthawk Phono Pre-Amp by Ray Sammuels
Schitt Loki
Wire World RCA Cables
Drop THX AAA 789 Headphone Amp
Blue Jeans Speaker Cable Belden 10-gauge 5T00UP (Front L&R and Center)
Blue Jeans Interconnects LC-1's