Radial Engineering R800-7096 Headlight Guitar Amp Selector

The Radial Headlight solves the multi-amp problem at its source. When you run one guitar into multiple amplifiers without transformer isolation, you're creating ground loops — parallel ground paths between each amp's chassis through the shared guitar cable shield. The result is hum that gets louder as you add amps. The Headlight's transformer-isolated outputs break those ground paths individually, so each amp sees only the audio signal, not the AC ground reference from the others. The Class-A input buffer upstream of the switching network ensures that the total load of four amp inputs doesn't collapse your pickup's output impedance and roll off the high-frequency content of your tone — what goes into the Headlight comes out at each amp intact.

Built in Radial's heavy-gauge steel enclosure, the Headlight is made for the kind of repeated setup and teardown that reveals build shortcuts on cheaper switchers — the switches that develop crackle, the inputs that get intermittent after a season on the road. The relay switching is silent, meaning amp combinations can be changed live without any artifact in the signal. Running on 9V DC from any isolated pedalboard supply, it integrates cleanly into existing rigs without a dedicated power brick. The routing flexibility — any single amp, any combination of two or three, or all four simultaneously — gives players blend and layer options that go significantly beyond what a basic A/B box can do.