How do you turn on the JBL subwoofer System?

[Lee Vining]

We spent time and effort, read the user's book, no directions and we’ve tried every trick. Thanks for any takes;

 

[Lago35]

You can't trun on the subwoofers because there are no subwoofers! You have to install them separate and the plug them into the system. If pull the radio out you will see the connections for the subwoofers. I'm pretty sure there labeled.

 

[Lance2445for6]

Having the same issue in my 2024 Lance 2445. The JBL Nano subwoofer comes “installed” from the factory, but they installed it as though the head unit is, in fact, JBL. Although labeled JBL, it’s an aftermarket made for campers and other rec vehicles. You’ll need to pull the subwoofer and connect the blue line to the REM out line in the head unit.

 

[Late]

Look on the left side of the center JBL panel where you see "A" "B" "C". I believe these represent Left, Right, and Subwoofer, so make sure you press B and C to get all your speakers working. Looks like you have only "A" selected (center display, under VOL). Once "C" is on you can use the subwoofer control dial to adjust subwoofer output. You should also see "A B C" in the center display under VOL.

Mine is a 2026 model, if yours is older make sure you double check that you don't have outside speakers installed. In the last few years Lance has been giving us the JBL portable bluetooth speaker instead of installing speakers outside. Usually those A, B, C selections represent speaker zones, and in the olden days when they installed speakers on the outside one of the buttons would select the outdoor speakers. Made that mistake once in my old trailer and embarrassingly played music for the campground all night...

 

[Late]

You can't trun on the subwoofers because there are no subwoofers! You have to install them separate and the plug them into the system. If pull the radio out you will see the connections for the subwoofers. I'm pretty sure there labeled.

I think there is a subwoofer installed in the panel below what you see in the photo. The subwoofer rotary control is in the photo just below the right speaker.