Behringer HA400 MicroAMP 4-Channel Headphone Amplifier — main product image

Behringer HA400 MicroAMP 4-Channel Headphone Amplifier

Behringer

Behringer HA400 MicroAMP 4-Channel Headphone Amplifier

Name: Behringer HA400 MicroAMP 4-Channel Headphone Amplifier
Brand: Behringer
SKU: HA400

★★★★★4.5 (8594 reviews)

Behringer's ultra-compact HA400 powers four headphones independently with studio-grade op amps at a budget price.

$24.90*

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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Behringer HA400 MicroAMP is a 4-channel stereo headphone amplifier designed for situations where multiple listeners need to monitor the same audio source simultaneously. Whether you are tracking several musicians who each need to hear the playback, running a podcast with multiple hosts, or simply sharing audio in a classroom or rehearsal setting, the HA400 takes a single stereo input and distributes it to four 1/4-inch headphone outputs, each with its own volume control knob. This means every listener can dial in their own comfortable level without affecting anyone else.

Inside the compact chassis, Behringer uses ultra-low-noise 4580 operational amplifiers — the same components found in larger, more expensive audio equipment — to maintain audio fidelity across the full frequency range of 20 Hz to 20,000 Hz, even when all four outputs are driven at high volume. The included 12V DC adapter provides stable, consistent power. While it lacks advanced features like individual EQ, balanced inputs, or a built-in power switch, the HA400's strength lies in its simplicity: plug in, turn the knobs, and everyone hears clearly.

Key Features

If you're tracking more than one musician at a time, or if everyone in the group wants to listen to the playback, you’re need a monitor distribution system. A distribution system allows everyone to listen in, and control the volume of his or her own headphones. The compact and flexible HA400 can power up to 4 pairs of headphones and up to 4 independent volumes, with outstanding audio quality – even at maximum volume!

You can use this super-compact stereo headphone amplifier with practically any headphones – four of them at the same time, to be exact! Let up to 4 different people in your studio listen to the main mix while recording, and each listener can determine their own preferred volume level using the dedicated output level controls. The HA400 contains 4 high-power stereo amplifiers that maintain the highest sonic quality even at maximum volume levels. Ultra low-noise 4580 operational amplifiers are employed for outstanding audio performance – these are the same op amps found in “full-size” audio equipment – plus, a dedicated 12-Volt DC adapter is included.

When a recording session calls for everyone's heads – and ears to be in the game, the HA400 is the perfect solution – and a real money-saver!

Phones Level control per channel. When a recording session calls for everyone's heads – and ears to be in the game, the HA400 is the perfect solution

DC 12 V adapter included

Ultra-compact stereo headphone amplifier with 4 channel output, perfect for studio headphones, audio interface, mixer, and monitoring setups

Specifications

Brand

Behringer

Model

HA400

Channels

Amplifier Type

Stereo

Operational Amplifiers

Ultra-low-noise 4580

Frequency Range

20 Hz – 20,000 Hz

Power Supply

12V DC adapter (included)

Pros & Cons

👍 Pros

Four independent headphone outputs each with dedicated volume control for flexible monitoring
Ultra-low-noise 4580 op amps deliver clean audio quality even at maximum volume
Extremely compact form factor takes up almost no desk or rack space
12V DC adapter included in the box, ready to use immediately
Very affordable entry point for multi-headphone monitoring in studio or rehearsal settings

👎 Cons

Single stereo input only — no individual mix control or aux sends per channel
No balanced XLR or TRS input, limiting connectivity with professional mixing consoles
Plastic construction feels less durable than metal-chassis alternatives
No power switch on the unit itself; you must unplug the adapter to power down
Outputs are 1/4-inch only, requiring adapters for 3.5mm headphones

Frequently Asked Questions

Can each person connected to the HA400 set their own volume level?

Yes, each of the four headphone outputs has its own dedicated volume knob, so every listener can adjust independently.

What type of input does the HA400 accept?

It accepts a stereo signal via its 1/4-inch TRS input, which carries the same mix to all four headphone outputs.

Does the HA400 require batteries or external power?

It runs on the included 12V DC power adapter — no batteries are needed, ensuring consistent power delivery.

Will the HA400 work with high-impedance studio headphones?

The four high-power stereo amplifiers are designed to drive a range of headphones, though extremely high-impedance models (above 250 ohms) may not reach full volume at demanding listening levels.

Is there any audible noise or hiss at high volume?

The HA400 uses ultra-low-noise 4580 operational amplifiers — the same op amps found in full-size studio equipment — so noise remains minimal even at maximum output.