Behringer MicroAMP HA400 4-channel Headphone Amplifier (HA400d1)

Generate a 100-character excerpt from the product description below. Return ONLY the excerpt text, without any prefixes, notes, or explanations. Example: “Compact wireless speaker with 12-hour battery life and waterproof design.” Product description: Ultra-compact 4-channel stereo headphone amplifier.
Demo 4-Ch Stereo Headphone Amp