Astell & Kern AK300 Series Headphone Amplifer in Meteoric Titan The AK380 Ammp is designed as an extension of the light and shadow theme of the AK380 Media Player AK380 Media Player Sold Separately The area of the amplifier in contact with the AK380's volume wheel reproduces the design's angle of reflection for comfortable wheel operation. The amplifier's light shining delicately through the gaps in the reflected surface visually accentuate the The wheel on the rear of the amplifier that connects the two devices is a representation of the volume wheel seen throughout Astell&Kern products and expresses Astell & Kern's unique design identity.