Ever since Leo Fender revolutionised the music world with his mass production techniques and practical designs, the combo amp has been a constant companion to the electric guitar. Especially popular with gigging guitarists, particularly blues, jazz and country, combo amps are very useful wherever great tone is required at less than deafening volumes. Many studio guitar sounds were created recording small vintage combo amps turned all the way up! The most popular speaker choice for a combo is a 1 x12", but 2 x 12" and 1 x 10" are also common, and there are many other configurations possible. The JOYO JTA-05 "Sweet Baby" Tube Guitar Amplifier is a classic champ of a combo amp, great for a valve sound!