The primary goal of Astell & Kern has always been to deliver the original sound. We're proud to introduce the AK380 AMP, an amplifier that supports high-impedance headphones and high-gain output while remaining faithful to the original sound. Expansion-type amplifier with design unity. 3,400 mAh large-capacity battery. 8.1 VRMS high-gain balanced output. 4.1 VRMS unbalanced output. The AK380 AMP boasts convenient portability. The many points of discomfort in conventional amplifiers have been addressed by adopting an integrated design for greater convenience. Colour: Black.