Hello, I’m Nathan, and I’ll be assisting you today. My livelihood depends on your positive feedback, so your satisfaction is my highest priority.
Sorry to hear you’re having trouble.
What do you mean by cannot be recognized? Does the 2nd not output a test tone for the setup mic?If you swap the leads to the 2 subs, does the sub that initially wouldn't work still not do anything?
Are you using the setup mic?Do you have your main (front) speakers set to large or small?
I would recommend the mic as well.
Try setting your fronts to small and run it again to see if the 2nd is recognized.
Okay we'll need to do a microprocessor reset next.
Power the denon off
press and hold the tuner preset +/- buttons on the front
keep holding while powering back on, and hold until the display starts flashing, then release and run through the setup again
This depends on the other configurations of the system.
Typically it treats them as 1 in most cases.
The only time it would recognize them separately and send different signals to each is if you had the front speakers on small in which case 1 sub is used to reinforce the bass for the fronts, and the other is used for LFE.