Duh I missed that as I was thinking about how I used the manual settings on my Yamaha on the LFE settings. As I have not not messed with it in a long time.Iam getting old (60)
The Revox was my late Dad's, I am re-learning how to use it as I played with his old Viking 7' R2R when I was kid in the 1960's. Now that I am into the R2R I want a B-77 2 track 15 speed. But I was suprised how clean the A-77 4 track at 7 1/2 plays. It is near mnt condition and I am looking for someone to replace the Rifa and Franko "Caps" that seem to fail these machines every 30 years or so

My MkIV Dolby is a 1977.it's time.
I am glad they found that the sub was at fault, I hate to unplug and start over when I remove my A/V Receiver. Usuallly a 3 hour tour

EDIT a much longer tour for your huge room.
I looked at your system and remembered seeing it on Ebay as you make recordings from different formats. WOW what a Great room you have. Do you know "ZAP" (Terrence) the Revox man in the UK?? I have purchased several items for the Revox from him.
Regards
Louis