Acoustic Instrument Preamp for Live Performances The Radial Tonebone AC Driver is a compact acoustic instrument preamp designed for onstage use, with smart features to streamline your setup and optimize the tone of your acoustic-electric guitar or other piezo-equipped axe. The AC Driver incorporates Radial’s Class A buffer circuit to ensure pristine audio quality, giving you the freedom to use longer pedal chains and cable runs without signal loss or degradation. Monitor yourself onstage via the 1/4" amp output, or use it to feed the PA. Tap the rugged mute footswitch to silence everything but the tuner output — handy for silent tuning or to noiselessly switch between instruments. GearNuts's advice: The Radial AC Driver provides more control over your sound than a simple DI box, making it ideal for live shows, particularly if you don’t have a dedicated sound engineer.Smart features and rugged build quality Radial equipped the AC