I can't believe I never opened this thread to see what was going on until today.
1st, I don't have any experience whatsoever with the MB combo's/cabs or whatever they are but that doesn't much matter in this case.
I thought this way of doing things ended in the 70's judging by old cabs I've picked up at garage sales, craigslist, sitting on the side of the road with some other junk, etc. I've run across some that didn't but old Peavey's, EV's, off-brand/no-name stuff still at least had a piece of carpet padding or insulation like is in your house or something stuck in there.
Apparently this is common in markbass and some other stuff as well? I don't get that as a costcutting thing. You can get stuff like mattress foam or whatever in pretty big pieces for little money
at retail. At wholesale prices, I can't see getting a big roll of this stuff and having some chinese dude staple it in for 30 cents an hour being that expensive over a run of 100 cabs/1000 cabs/whatever. The more zero's you add, each one gets cheaper.
Does it put me off to GK, not really because I've never owned their cabs and probably won't. I've always really liked their amps and still do. It is lame skipping such basic, proven build techniques.
You could always say, "leave it alone because we designed it that way and that's how it's designed to work because we designed it to work that way."
Should've cheaped out somewhere else in the chain.
You've seen those see-through plexiglass guitars? I've often thought of doing a cab like that but you can't get around not being able to see through the lining and the lining has to stay.