When Harper told Dumble about his friend's yard sale find, the amp maker told him to bring it in. He agreed to give the amp a once over and fine-tune it to Harper’s needs, just as he had for Carlos ...

Owning the amp afforded Harper a meeting with the legendary amp builder, who soon revealed its surprising past ...

Mad Professor has unveiled its eagerly anticipated Simble MKII, with the revised overdrive ... even the Dumble clone amps are not quite like the real thing. There’s no like for like (which is why ...