The worst amp I've owned myself was a Badger, which was either 10w or 15w, I can't remember which. Either way the sound was totally cr@p and I gave it to a friend for his daughter to practise on as she had nothing at the time. I'd also like to mention my son's Fender Frontman 15w, which is unbelieveably bad for something with 'Fender' written on the front.