Behringer MicroAMP HA400 Ultra-Compact 4-Channel Stereo Headphone Amplifier

Distribute pristine studio-quality sound to up to four listeners with the Behringer MicroAMP HA400. This super-compact headphone amp features four high-power stereo amplifier sections—each with its own volume control—so everyone can dial in their perfect level without compromising audio fidelity, even at maximum volume. Plug your mix into the ¼″ TRS input, then connect four headphone pairs to the dedicated outputs. The included 12 V DC adapter powers a rugged metal chassis built for road use, while ultra-low-noise 4580 operational amplifiers preserve detail from 20 Hz to 20 kHz2.

Technical Specifications

• Input: 1 × ¼″ TRS stereo

• Outputs: 4 × ¼″ TRS headphone jacks (independent volume controls)

• Frequency Response: 20 Hz – 20 kHz (±0.5 dB)

• Power Supply: DC 12 V adapter (included)

• Form Factor: Desktop, rack-mountable with optional kit

• Dimensions: 4.06″ (W) × 2.25″ (D) × 1.83″ (H)

• Weight: Approx. 0.38 lb (0.17 kg) for ultimate portability

Key Features

• Four Independent Stereo Channels: Power up to four headphone pairs simultaneously.

• Individual Volume Controls: Tailor listening levels per channel without affecting others.

• Ultra-Low-Noise Circuitry: Uses 4580 op-amps to maintain sonic accuracy at any volume.

• Rugged Metal Chassis: Road-ready construction withstands frequent setup and teardown.

• Plug-and-Play Design: Single ¼″ TRS input and 12 V DC power make installation effortless.

• Broad Compatibility: Works with virtually any headphones (16–600 Ω impedance).