Those biamped Meyer cabinets are awesome but ridiculously expensive ... a single 12" + horn is thousands and thousands of dollars. Weir was using 15" + horn, I think, and four of them. That's enough PA for an entire loud band. I'll bet he could hear himself.
Years ago, when I played with UJB in Tampa, I would put the amp in front of me, leaning back, like a vocal monitor. Then I could hear everything perfectly without being stupid loud.In fact, I got the rhythm guitarist to do that, too. The PA took care of out front. I saw some recent photos of those guys at Skipper's in Tampa and it looks like they are still doing that.
With Playing Dead, I used to ask for enough guitar in my vocal wedge to fill it out without having to crank the JBLs up to death-ray levels. It helped, although the sound of the JBLs miked through the monitor was pretty bright for my taste, probably as a result of EQ'ing the wedge for vocals.
Now that I have the K12 as a floor wedge, I am a happy camper onstage.
BTW, MK, my Walker guitar with all three pickups on just kills on the late 70s early 80s Weir tone, thanks for the tip. I find I like it even better with the bridge and neck as humbuckers, fattens it up a bit without losing the glassy phased tone. Sounds equally good in the AxeFX with a Fender, Vox or Roland JC amp blocks and various speaker cabinet blocks -- JBLs, Jensens, EVs, Celestions, etc. The tube preamp drive characteristics just seem to add more warmth to it. It's definitely all about the three pickups being on. A very happy byproduct of my pickup wiring madness that I wasn't even trying to achieve. Now I want to try dialing in the phaser and wah pedal combination where the wah sweep also controls the phaser sweep.