Just bought my first Kustom rig, K250-1 with 2-15 B cab loaded with JBL D140's. I think the amp and cab sound pretty great as is. But when I removed the back to check the speaker brand, I noticed the ports are blocked. It looks like work that was done a long time ago, and I am wondering if perhaps it was done in the factory. I have pictures to upload, but the icon in the post form doesn't seem to be working for me. Did they block ports depending on what speakers were used?
I'm trying to bring a Studio 4V back to life.
Some tried to convert to EL34 and some magic smoke happened.
Chopped the combo to a headshell and painted it black.
Does anyone could supply me a schematic and maybe a connector diagramm?
It looks somewhat easy but there are modifications I want to revert back to stock
and maybe some butchering caused the trouble.