The Behringer MICROAMP HA400 is an ultra-compact 4-channel stereo headphone amplifier that lets four people listen to the same source at their own preferred volume. It is the simple, affordable answer when tracking multiple musicians, teaching, or sharing playback in a studio session. Inside, four high-power stereo amplifiers maintain outstanding sonic quality even at maximum volume, built around ultra-low-noise 4580 operational amplifiers of the type found in full-size audio equipment. A dedicated output level control for each channel gives every listener independent volume adjustment, and the unit works with practically any headphones. Power comes from the included 12 V DC adapter, and its palm-sized footprint fits any desk, rack drawer or gig bag. For home studios, schools, podcasting groups and rehearsal spaces across Kenya, the HA400 turns one headphone output into four individually controlled listening stations. Key Features: - 4-channel stereo headphone amplifier for all headphone types - 4 high-power stereo amplifiers with excellent headroom - Individual output level control per channel - Ultra-low noise 4580 operational amplifiers - Powers up to 4 pairs of headphones simultaneously - Included DC 12 V power adapter - Ultra-compact, portable housing