Sure thing, bass cable in, cable out to amp, is just one way to use the B3.
I’ve also used it to go: bass-B3-mike cable direct to the PA board.
Mostly, I’m hooked up via USB to my Mac, and I use some inexpensive in ear monitors, or headphones. The usb will power the unit.
The drum machine and looper made the B3 the choice for me. It’s an all in one headphone practice station. Playback via usb from the Mac. It’s an interface if I want to record to GarageBand or some other DAW program. The drum machine and looper function together, it’s very easy to use well.
A word about any of the multi effects....the pre programmed patches and sounds are usually not great, and can have wildly different levels. The artist patches on the B3 give you a look into what the artist uses, you can build from there.
You’ll have to learn how the master, or global controls work and then build your patches. The software editor makes this easy, all on your screen. Plug in the B3 by usb, the unit lights up, and the editor loads.
There will tons of effects, amps and cabs, to figure out.
The nice thing about the B3, is it acts like three stomps joined together. Each box can be adjusted with the knobs right on the stomp. This reduces the layers of menus to navigate. And each stomp is pretty clearly labeled and backlit. You look down and see “stereo chorus”. Or “wah”, or “Reverb”.
Other multi, you have to remember what you assigned to each switch. That’s why you see home made labels stuck on line 6 and other multi. Guys label the footswitch and always assign that style of effect to the same switch.
With the B3 you can drag and drop effects from one position to another in your signal chain. And it’s easy to see.
Looks like B3’s are going for around $100 used. They are built tough. Mine has been in steady use for years, no issues. Lots of gear comes and goes at my house, the B3 is a keeper. Many a boutique pedal has been and gone, the B3 has stayed. And you can always use other pedals with the B3.