Just bought a Marshall cab and want to open the back to look at what speakers are housed inside, but I can't seem to get it off.
I've taken the screws out but it's still wedged in.
I've tried putting a credit card down the side but it wouldn't fit.

Anyone know how to do it?
I don't want to damage the cab by wedging a screw driver down there

Help appreciated
push a couple of screws back into the holes - without turning them, you dont want the threads to bite into the cabinet side. Then push down (or up) on the screws - not too hard - so they grip the back panel of the cabinet, then pull. its a little bit easier if you have a 2nd person holding the cab steady while your doing it, Otherwise just start at one corner and work your way around.
got it off in the end by taking the speaker input on the back off and reaching through that and pulling.