Have my ultra and subwoofer hooked up and running. Everything is mostly ok. Sounds good. One thing I noticed is that the sub volume stays constant. Even if I turn the volume up or all the way down. The sub keeps playing? I have a Willsenton r8 it doesn’t have a sub output so I use the one on the ultra. Sounds great but the volume of the sub stays the same. I’m using LFE on the sub to the ultra.