On Stage GA5000 Guitar Headphone Amp Practice your electric guitar whenever you want with the On Stage GA5000 Guitar Headphone Amp. Simply plug the GA5000 directly into your guitar, plug in your favorite headphones, and rock out in privacy. No cable necessary. Tone and Gain controls let you tailor the sound from sparkling clean to shredder saturated. Small and lightweight, the On Stage GA5000 headphone amp fits in a pocket or gig bag and it won&t get in the way while playing.