Take control of your dirty boost tone with the Electro-Harmonix Crayon overdrive pedal. This modern take on a classic dirty boost puts independent control over bass and treble bands in your hands, allowing you to contour your overdrive tone. Need a cutting midrange boost? Sure the Crayon can provide that, but it's also great for beefing up your bottom end or adding air to your highs. What's more, the Crayon can be all the distortion you need, but we were even more impressed by how it sounds when you couple this dirty boost with an already distorted tube amp.