Stack

In addition to methods and types of amplification, guitar amps also come in different physical configurations. Along with the Combo style, guitar amps also come in separate Head, which refers to the amplifier section and Speaker Cabinets. These allow you to use any amp head with virtually any speaker cabinet. They also break the amp into two units, making each unit lighter and easier to carry than a single combo. Combining two cabinets and a head is called a “stack.”