Signal Channels
1 input / 4 outputs
Product Overview
Harmonai HA400 is a 4-channel stereo headphone amplifier, featuring a clean architecture with one audio input and four independent headphone outputs. It amplifies and distributes a single stereo audio signal to four headphones simultaneously—ideal for multi-user synchronized monitoring in rehearsal rooms, recording studios, and training environments. Its compact chassis fits neatly on desktops or in standard 19-inch racks, with intuitive operation and true plug-and-play functionality.
Amplification Architecture
Stereo headphone amplification
Output Method
4 independent headphone outputs
Model Number
HA400
Typical Applications
Multi-track monitoring in rehearsal rooms: Each band member wears headphones for synchronized, interference-free listening.
Multi-position monitoring in recording studios: Engineer and vocalist each monitor the same take in real time.
Educational training: Instructor plays reference audio while multiple students listen simultaneously via their own headphones.
Live streaming with multiple camera operators: Streamer and crew monitor identical audio feeds to ensure signal consistency.
For technical specifications or bulk procurement options, please contact the Harmonai support team.
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