I first did it with Audyssey. As a result, I discovered that I barely got any sound from the sub.
therefore a factory reset. after this manual setup was done. the test tone made the sub come to life, but after that it was nothing again. so the sub just works. What happens if I plug the plug into subwoofer output 2 and it indicates that I have 2 subwoofers while this is not the case?