The problem with jam is that, while it tastes great on toast, it’s a hopeless medium for soldering. So the makers of The ‘Jam’ Jar had the revolutionary idea of removing all the jam from the jar before converting it into a miniature guitar amp.
The two-inch speaker built into the lid sounds pretty brutal, but plug this thing into a full-size cabinet and you’ll be amazed by its smooth and powerful overdriven sound. You can even clean it up (just about) by backing off on your guitar’s volume control.
We’d take one of these over the old Smokey fag-packet amp any day. Partly because it’s louder, but also because you don’t have to worry about what the makers did with the original contents. Bit of toast never harmed anyone, did it?