Warranty will certainly be void after any upgrades or mods inside the box.
If you don't like the amp how it sounds originally, you'd better change it. I'm sure there are many who would rather take the original product with warranty especially if such is transferable. You may exersise mods on products with no warranty.
If you don't like the amp how it sounds originally, you'd better change it. I'm sure there are many who would rather take the original product with warranty especially if such is transferable. You may exersise mods on products with no warranty.