I went back in and tried it. It's dead quiet, as in, I couldn't get any sound out of it. I'm thinking it could have something to do with the crappy cables they have. The guy helping me didn't know there is a difference between instrument and speaker cables, and all of their cables have a right angle end on one end that looks like it isn't going in all the way, no matter if it's on the amp or cab side.
I told him he shouldn't use instrument cables out of amps, but he acted like he thought I was talking out my butt. We got a weak sound that would come and go.
While I was there, I sold a bass, amp, and gig bag for them to a kid that wants to learn. I pointed him away from the cool looking Rogue to a decent Ibanez, and away from a guitar amp to a bass amp. I gave the kid a 15-minute lesson on the basics and told him to call me after he's made noise for a week so I could give the bass a setup.
I made sure the shop gave him a good deal, but also told the guys that the kid was going to walk away because no one was helping him. They owe me.
Oh, back to the head- I'll go back with a proper cable and see what it does. There would always be a nagging thought about if they smoked it by using instrument cables. The first time I tried it, it was great...