i think it works
it means being able to really move some air.
i also have the demeter box.
i forget which one is which.
i have one with a 57 and one
with a royer 121.
i notice the difference in the mics much
more than the boxes
the randall box is better isolated
I was gonna get one of these . . . I ended up w/ a large 4'X4' vocalbooth.com amp box to fit my 4X12. Glad I did - I really like putting a few mics on a cab. . . doesn;t isolate all that much. enough though. . .