HeadRush Core Guitar Multi-effect/Amp Modeler/Vocal Processor UnitThe HeadRush Core Guitar FX, Amp Modeler, and Vocal Processor Unit provides virtually unlimited impulse response loading, and the ability to capture the sound of your own precious analog gear with smart cloning technology. For the singers who need a complementary vocal processing unit, the Core also features a full suite of vocal FX including the industry standard Antares Auto Tune and a best in class looper. Complete Guitar and Vocal Rig The HeadRush