Feature:1. Ultra-compact stereo headphone amplifier for studio and stage application.2. With 8 headphone output channels and 1 input channel.3. Volume of each output channel can be controlled independently.4. Provides highest audio quality for each headphone even at maximum volume.5. Ultra low noise 4580 operational amplifier for outstanding audio performance.Specification:Features:Ultra-compact stereo headphone amplifier for studio and stage application.With 8 headphone output channels and 1 input channel.Volume of each output channel can be controlled independently.Provides highest audio quality for each headphone even at maximum volume.Ultra low noise 4580 operational amplifier for outstanding audio performance.Comes with a DC 12V power adapter.Specifications:Plug: EU / US / UK (Optional)Line Input: Type: 1/8" TS connector, stereo Impedance: 100k Max. Input Level: +15dBuHeadphone Output: Type: 1/8" TS connector, stereo Impedance: Approx. 80 Max. Output Level: Approx. 49mW in 100Material: MetalItem Size: 196 * 57 * 31mm / 7.72 * 2.24 * 1.22inItem Weight: 332g / 11.72ozPackage Weight: 509g / 17.97ozPackage Size: 23.5 * 16.3 * 6cm / 9.25 * 6.42 * 2.36inPackage List:1 * Amplifier1 * Power Adapter1 * User Manual (English)Package List:1 * Amplifier1 * Power Adapter1 * User Manual (English)