HA-4 Headphone Amplifier
HA-4 Headphone Amplifier Side AngleHA-4 Headphone Amplifier Fixing WingsHA-4 Headphone Amplifier Side View

HA-4 Headphone Amplifier


4-channel stereo headphone amplifier.

Product Description

The HA-4 Headphone Amplifier can output to up to four stereo headphones for high quality audio. Each output has individual volume adjustment making this amplifier incredibly versatile. The HA-4 Headphone Amplifier gives outstanding audio performance and can be used with many of our audio and video products. A DC 12 V adapter is included to power the device so the audio is the highest quality possible, even at maximum volume with four devices connected.

This amplifier is ideal for use within museums & heritage sites, where multiple headphones are needed alongside varying volume levels. The exceptionally rugged construction ensures that this amp is long lasting and incredibly durable.


  • Ultra-compact housing with fixing wings for easy install
  • Output for up to four headphones
  • Highest audio quality even at maximum volume
  • Can be used with many of our products
  • High quality components ensure long life & durability

Additional information

Weight 0.44 kg
Dimensions 64 x 132 x 190 mm
Input Connection

1/4 Inch Audio Jack

Input Impedence

100 kΩ

Power Supply

External 2vDC 2amp

Maximum Input Level

+15 dBu

Volume Control

4 Volume Control Per Channel

Output Connection

Terminal Connector x 4

Output Impedence

80 Ω

Maximum Output Level

40 mW in 100Ω

LED Indicator



  • HA-4 Spec Sheet
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