Border Patrol P20

About the Border Patrol P20

The BorderPatrol Border Patrol P20 is a high-end stereo Class A push-pull 300B valve power amplifier. It uses two 300B output triodes per channel, driven through an interstage phase-splitter transformer, and is available with separate external power supplies in dual-mono configurations. The amplifier is designed for efficient loudspeakers and provides transformer-coupled 4-ohm and 8-ohm speaker outputs. Historical P20 versions include standard, EXD, and EXD/EXS configurations; the EXD version uses upgraded components, while EXS refers to upgraded external power supplies. Available published information describes the P20 as a 20-watt-per-channel amplifier with zero negative feedback and RCA single-ended inputs.