How many musicians can use this at once?

The HP4E has 4 independent stereo output channels, each with both 1/8" and 1/4" headphone jacks, so up to 4 performers can plug in headphones simultaneously. Two stereo inputs allow you to route different mixes or the same mix to all four outputs.

What kind of headphones will work with this?

Any headphones with a standard 1/8" (3.5 mm) or 1/4" (6.3 mm) connector will work. Each output channel provides both jack sizes, so you can accommodate different headphone types on the same unit.

Does it fit in a standard rack?

Yes. The HP4E is housed in a 1RU half-rackspace metal chassis designed to integrate into standard rack-mounted systems without taking up excessive space.

Can each performer have a different mix?

The HP4E has individual volume controls per output channel, so each musician can adjust their own headphone level. The two stereo inputs allow you to route different sources or mixes to the four outputs depending on your setup.

What is the audio frequency range?

The HP4E covers 20 to 20,000 Hz, providing full-range audio reproduction suitable for music and spoken word applications.

AKG HP4E 4-Channel Headphones Amplifier

The AKG HP4E is a compact, solidly-built headphone distribution amplifier purpose-built for band rehearsals, studio tracking sessions, and live sound rigs where multiple musicians need independent headphone mixes. Its rugged metal chassis feels professional and fits neatly into standard rack configurations, while the intuitive layout of individual channel controls lets you dial in player-specific mixes on the fly without fumbling during critical takes or soundchecks.

Design & Build Quality

Housed in a rugged metal 1RU half-rackspace chassis, the HP4E integrates seamlessly into rack-mounted systems. The compact footprint and professional construction survive both studio and touring life without consuming excessive rack space, standing up to the wear of gigging musicians and session veterans alike.

Audio Performance & Connectivity

The unit delivers clean amplification through 4 independent high-power stereo amplifiers, each capable of driving headphones at the comfortable listening levels players need during long tracking days or live shows. With 2 stereo inputs feeding 4 stereo output channels, you can route multiple mixes to individual band members or create monitor blends on demand, while 1/8" (3.5 mm) and 1/4" (6.3 mm) headphone outputs per channel work with standard headphones and IEM adapters. Low output impedance of 11 Ohms and high input impedance of 100k Ohms preserve signal clarity and keep your mix transparent across all four players.

Key Features

4 independent high-power stereo amplifiers
2 stereo inputs, 4 stereo output channels
1/8" (3.5 mm) and 1/4" (6.3 mm) headphone output per channel
Unbalanced 1/4" (6.3 mm) input sockets
Individual volume control per output channel
Selector switch per output channel
Input impedance: 100k Ohms
Output impedance: 11 Ohms
Audio frequency bandwidth: 20 to 20000 Hz
12 V, 500 mA power adapter
Rugged metal 1RU half-rackspace chassis
Line level input design

The HP4E delivers rock-solid, independent headphone distribution with the per-player control and sonic transparency that recording bands and touring rigs depend on.

Condition	New
Country of Manufacture	China