HA400 4-Channel Metal Headphone Amplifier, Mini Stereo Audio Amp

The HA400 4-Channel Metal Stereo Headphone Amplifier is designed for professional audio monitoring and daily music enjoyment. Built with a rugged metal chassis, it effectively reduces electromagnetic interference and provides reliable heat dissipation for long hours of use. It features 4 independent headphone outputs with 1/4-inch TRS connectors, supporting simultaneous monitoring by multiple users—perfect for recording studios, stage performances, guitar practice, band rehearsals and home audio setups.With a clean mini profile, this headphone amp fits easily on any desktop or in your gear bag for on-the-go use. The included 12V 1A power supply ensures stable power delivery, low background noise and strong output to drive high-impedance headphones clearly. Widely compatible with PCs, guitars, mixers, keyboards and other audio equipment, the HA400 brings professional sound quality to personal listening and professional production alike.

• Standard 1/4" TRS Input & Output: Works with 32–100Ω headphones with 50mm drivers; max output approx. 40mA at 100Ω, drives up to four headphone pairs simultaneously.
• Low-Noise JRC4580 Op-Amp Chip: Imported high-fidelity, high-gain op-amp delivers clean stereo audio and independent channel level control for premium sound.
• 4-Channel Independent Volume Control: Each channel has separate volume knob; zero cross-interference, ideal for multi-person studio monitoring, recording and band practice.
• Ultra-Compact Metal Build: Sturdy all-metal chassis,lightweight and portable for easy carrying and desktop placement.
• Wide Multi-Scene Use: Powered by included 12V DC adapter; perfect for studio, stage, outdoor gigs, home karaoke, conferences, gaming and band rehearsals.