Guitar combo amplifiers include all the components of an amp stack in one enclosure. In fact, combo amps go back as far as electric guitars themselves, with pioneers like Leo Fender vastly expanding and improving the concept in the 1950s. If you're a gigging guitarist lugging your gear around the city and don't require the power and size of a full-blown amp stack, a simple 1x12 combo amp is probably all that you require. Virtually every major amp company, like Marshall, Vox, and Fender, makes combo models, while a massive crop of boutique builders like Dr. Z and Tone King continue to push the boundaries of how good combo amps can sound.