I happen to still have the ESS AMT-1 speakers that I bought around '74 (and by the way, they still put out sound "as clear as light"). The only speaker that out performs them (in my opinion) is the Martin Logan. But I digress... The cabinets on my AMT's still look like new. But speaker cabinets that just sit there day after day are a lot different from aircraft that are put through multi-G stresses every time they fly. I'm gonna stand on my recommendation to stay away from ANY hotmelt glues for aircraft use.
MJC