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For small and medium studio applications

The HP4E professional headphone amplifier features two stereo input and four stereo output channels of high-quality audio. Designed for ease of use, convenient switches on the front plate enable you to select your designed input. Each channel features both a 1/8” (3.5 mm) and 1/4” (6.3 mm) headphone output for easy connectivity – no adapters required. Housed in a sturdy metal chassis, the HP4E is an ideal headphone amp for any recording session.

Available in the US only.

Award-winning producer/engineer Steve Pageot about AKG HP4E:
Steve Pageot

„The signal coming out of the "HP4E" is so imma-culate and epic you will forget you had head-phones on.“

Small footprint
with 4 totally independent stereo high-power amplifiers in half 1 RU package

Carefully selected components
for high quality audio even at extremely high volume levels

Two stereo inputs
for full flexibility with independent selection of input for each output

Two outputs per channel
with each a 1/4” (6.3mm) and 1/8” (3.5mm) stereo socket so no adapter is needed

Rugged construction
with strong metal housing to withstand rough working environments

Technical Specification

Design 4-Channel Headphone Amplifier
Input 6.3 mm (1/4”) socket - unbalanced
Input impedance 100k Ohms
Output 3.5 mm (1/8”) socket and 6.3 mm (1/4”) socket per channel
Output impedance 11 Ohms
Audio frequency bandwidth 20 to 20000 Hz
Max. output level 220 mW
Distortion <0.05%
Signal to Noise better than 85 dB-A
Net weight (incl. power supply) 760 g


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