MR DJ Microamp HA400 Ultra-compact 4-channel stereo headphone amplifier

MR DJ USA HA400 Professional 4-Channel Stereo Headphone Amplifier with Independent Volume Controls

The MR DJ USA HA400 is an ultra-compact professional 4-channel stereo headphone amplifier designed for recording studios, podcast production, live sound, broadcasting, rehearsal rooms, and multimedia applications. Featuring four independent high-power headphone amplifier sections, individual volume controls, premium 4580 operational amplifiers, and ultra-low-noise circuitry, the HA400 delivers exceptional monitoring performance for multiple listeners simultaneously.

Key Features

• 4-CHANNEL PROFESSIONAL HEADPHONE DISTRIBUTION - Connect and power up to four headphones simultaneously with independent volume control for each output, making it ideal for recording sessions, rehearsals, podcasting, and studio monitoring.

• HIGH-POWER STEREO HEADPHONE AMPLIFIERS - Four independent stereo amplifier sections deliver clean, powerful audio with outstanding clarity and dynamic range, even at maximum listening levels.

• INDIVIDUAL OUTPUT LEVEL CONTROLS - Dedicated volume control for each headphone output allows every musician, engineer, or performer to customize their personal monitoring level without affecting others.

• ULTRA LOW-NOISE AUDIO PERFORMANCE - Premium 4580 operational amplifiers provide exceptional sound quality with low distortion and minimal background noise for accurate professional monitoring.

• ULTRA-COMPACT PROFESSIONAL DESIGN - Rugged metal construction and a space-saving desktop design make the HA400 perfect for recording studios, rehearsal rooms, broadcast facilities, podcast production, and live sound applications.

Product Description

The MR DJ USA HA400 Professional 4-Channel Stereo Headphone Amplifier is a compact, high-performance headphone distribution system built for recording studios, rehearsal spaces, podcast production, broadcasting, live performances, and multimedia applications.

Whether you're recording multiple musicians, monitoring playback, rehearsing with a band, or producing a podcast, the HA400 allows up to four listeners to monitor the same audio source simultaneously while independently adjusting their own headphone volume.

Powered by four independent high-power stereo amplifier sections and premium 4580 operational amplifiers, the HA400 delivers clean, accurate audio with virtually all headphone types—even at maximum output levels. Its ultra-low-noise circuitry preserves audio clarity while minimizing unwanted noise and distortion.

The rugged metal chassis and compact footprint make the HA400 easy to integrate into desktop studios, mobile recording rigs, rehearsal rooms, live sound systems, and production workstations.

When multiple headphone outputs are required without compromising sound quality, the MR DJ USA HA400 provides a dependable and affordable professional monitoring solution.

General Features

• Professional 4-Channel Stereo Headphone Amplifier
• Ultra-Compact Desktop Design
• Four Independent Stereo Amplifier Sections
• High-Power Stereo Headphone Outputs
• Individual Output Level Controls
• Ultra Low-Noise Circuit Design
• Premium 4580 Operational Amplifiers
• High-Fidelity Audio Performance
• Compatible with Virtually All Headphone Types
• Rugged Metal Construction
• Studio & Live Sound Ready
• DC 12V Power Adapter Included
• Reliable Long-Life Design

Specifications

Product Information

• Model: HA400
• Brand: MR DJ USA
• Product Type: Stereo Headphone Amplifier
• Number of Headphone Outputs: 4

Audio Features

• Four Independent Stereo Amplifier Sections
• High-Power Stereo Headphone Outputs
• Individual Output Level Controls
• Ultra Low-Noise Performance
• Premium 4580 Operational Amplifiers
• High-Fidelity Audio Performance
• Excellent Audio Quality at Maximum Output

Compatibility

• Compatible with Virtually All Headphone Types

Power

• Power Supply: DC 12V
• DC Power Adapter Included

Construction

• Heavy-Duty Metal Housing
• Ultra-Compact Desktop Design
• Finish: Black

Perfect For

• Recording Studios
• Home Studios
• Podcast Production
• Live Sound
• Broadcast Studios
• Rehearsal Rooms
• Musicians
• Audio Engineers
• DJs
• Houses of Worship
• Educational Audio Labs
• Multimedia Production

Package Includes

• (1) MR DJ USA HA400 Professional 4-Channel Stereo Headphone Amplifier
• (1) DC 12V Power Adapter

Warranty

• 1-Year Manufacturer's Warranty

Warning: This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.gov