@Melissa6742 Welcome back. It’s been a while.
These are supposed to be great (although pricey) cabinets.
And this is all you needed to prove he wasn’t a keeper.
I looked up the SWR WorkingPro 15 and some people complain it doesn’t have enough power to keep up with a full band on a gig. This is pretty subjective since it depends on what and where you’re playing.
If it does sound like it can’t keep up, and you like the SWR sound, you could get an SWR head with twice the power for what the WorkingPro 15 typically goes for and it should work great with the cabinet you already have.
This one is less than $300 Used SWR SM400 Bass Amp Head
I’m not saying you should get this one. Just showing it as an example.
I think this goes for all guitarists.
They make the assumption that since tubes work so well for guitar, it must be that good for bass. This isn’t, necessarily, the case. You don’t need tubes to get a great bass tone. You only need tubes if you want a ‘tubey’ bass tone. There are people who prefer solid state amps, believing they give bass more clarity and punch.
It’s always best to go with your own ears on this.
Good luck and let us know how it works out.