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I have an amp Blackheart handsome devil combo year 2010.
Its time to change the tubes , I tried to open the back panel but after opening all the back panel screws and the two side screw
The panel is not able to open .
I have a new tubes reference to the amp spec.
Please advise how can I open it and replace the tubes ?
if you have a special instructions it will help .

Some gently prying with a butter knife all around the panel is what I've read.
Everyone says they are very tight.

Good luck!

Sometimes the tolex glue seeps out and makes them a pain to open.

Then there's amps that have seen too many kilometers on the road gigging.... I don't even want to contemplate what's gluing them together, I just put on surgical gloves and fix it