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 designed for studios, live sound setups, and rehearsal spaces 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 makes operation straightforward during sessions.

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 ensure durability in both studio and touring environments without consuming excessive rack space.

Audio Performance & Connectivity

The unit delivers clean amplification through 4 independent high-power stereo amplifiers, each capable of driving headphones at comfortable monitoring levels across band members, session musicians, or talent. With 2 stereo inputs feeding 4 stereo output channels, you can distribute one or two independent mixes to multiple headphone users simultaneously, while 1/8" (3.5 mm) and 1/4" (6.3 mm) headphone outputs per channel accommodate any standard headphone connector. Low output impedance of 11 Ohms and high input impedance of 100k Ohms ensure minimal signal degradation and transparent audio pass-through from your mixing console or interface.

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 solves the practical challenge of feeding independent headphone mixes to multiple performers or band members in recording and live tracking sessions, delivering reliable signal distribution with the control and connectivity essential for professional tracking environments.

Condition	New
Country of Manufacture	China