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 levels. With 2 stereo inputs feeding 4 stereo output channels, flexibility in routing and distribution is built-in, while 1/8" (3.5 mm) and 1/4" (6.3 mm) headphone outputs per channel accommodate standard headphone connectors. Low output impedance of 11 Ohms and high input impedance of 100k Ohms ensure minimal signal degradation and clean audio transfer.

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 reliable, independent headphone distribution with the connectivity and control needed for collaborative recording and performance environments.