The Hot Amp Box is a linear booster whose simple circuit is based on the EH LPB1. A socket is used for the single silicon transistor so it can be replaced easily. The Hot Amp Box can be used to overdrive a valve amp or just simply to boost the overall volume. If the player wants to let the pedal on the whole time it can be easily placed over the amp thanks to its smart design. It can also be placed on the floor and bypassed through its true-bypass switch. LED and -9V DC jack are included. This little white box will make any good tube amp sound really, really hot.