I finally pulled some speakers on this reissue Acoustic 8x10....it has 3 partial 1/2 inch thick mdf shelves placed inside the cabinet, with a cutout on the front speaker baffle. So basically there is not enough reinforcement on the front speaker baffle..... when you tap the front baffle in the middle section top to bottom it vibrates like crazy! The sides are actually quite strong and the back baffle has the shelving attached all the way across the back. So.......I am adding four 1" x 1/2" x 13 3/8" reinforcement boards running from the front to back baffle in the weakest point.....this will tie together the front and back baffles as they will be glued and screwed in place....this is similar to how Marshall reinforces their 4x12's front to back. The next issue is the shelves themselves vibrate (what a cheap design)...so I will tie them together as well. This will add some weight maybe 4 to 5 pounds but I know will improve the cab performance by minimizing vibration on the front baffle, back baffle and shelves inside. I can load pics to cell phones or Facebook if any wants to see what the inside looks like in these Acoustic reissue 8x10's. Thought I would share!