How to remove the back from a Mesa Boogie 2x12 cab/Why is one of the speakers reducing in volume every now and then

[nightlight]

Having a bit of difficulty with my Mesa Boogie 2x12. The sound of one speaker keeps coming and going, so I wanted to open up the back and take a look.

Unfortunately, the backboard is wedgely solidly inside. I tried removing the jack at the back to pull it outward, but it doesn't even budge. Any suggested? I already tried running a thin knife in between the board the cab, but that didn't help.

I've tried other steps such as switching the cab from mono to stereo (without an amp connected) and also putting my hand through the space for the jack plate to reseat the connectors, but that didn't help.

Hoping someone has some suggestions that will fix the intermittent sound problem, I don't mind if I can fix this without the back plate. Then jack is connected to a circuit board that allows the jack to be run in stereo with two 8 ohm outputs or in 4ohm/6ohm as a mono cab, so I am very careful while trying to pull anything.

 

[griff10672]

you can try putting the screws back into just the corners ... just screw them in so they are just as far into the back board as they will go without going into the cab .... so like a 1/4 inch or so .... then grab the remainng parts of the screws with pliers or vise grips on two opposite sides .... and yank ... with even pressure on both sides

careful not to ruin the screws ...... if you try to pry it out .... you'll most likely rip the tolex up ... if you have other screws that match the originals use those to not mess up the originals

 

[nightlight]

you can try putting the screws back into just the corners ... just screw them in so they are just as far into the back board as they will go without going into the cab .... so like a 1/4 inch or so .... then grab the remainng parts of the screws with pliers or vise grips on two opposite sides .... and yank ... with even pressure on both sides

careful not to ruin the screws ...... if you try to pry it out .... you'll most likely rip the tolex up ... if you have other screws that match the originals use those to not mess up the originals

Thanks, I’ll try this.

 

[griff10672]

Thanks, I’ll try this.

just be careful not to destroy the original screws ....

 

[JimAnsell2]

some of their cabs have this sticky sealing strip on the inside pannels for maximum tightness i guess.
i've used a hair dryer to loosen it up and that helps.

 

[The~Kid]

I opened up my 212 Bad Cat a couple days ago because I was curious.....



Thing was a bitch to open up but yeah with a metal fork it was easier to pry open. I just use the top left corners edge from leverage and yeah. Popped open with some elbow grease with no damage to anything.

 

[rstites]

Use auto plastic panel removal tools. They allow light prying but don't do the damage of metal tools. Work your way around the cab to gradually work the back off.