Calrad 15-139 4 Channel Stereo Headphone Amplifier

Four Channel Headphone Amplifier for Shared Listening

This four channel stereo headphone amplifier is built to distribute a single audio source to multiple listeners while maintaining clarity and control for each user. It allows up to four sets of stereo headphones to be connected at the same time, making it ideal for studios, classrooms, rehearsal spaces, and collaborative audio environments.

Independent Volume Control for Each Listener

Each headphone output is equipped with its own dedicated volume control, allowing every listener to adjust levels without affecting others. This design supports comfortable monitoring in group sessions, recording setups, language labs, or educational applications where individual listening preferences matter.

Clean Audio Performance with Low Noise Design

The amplifier is engineered with low-noise operational amplifiers that deliver clear stereo sound with minimal distortion. This ensures accurate audio monitoring across all connected headphones, making it suitable for both critical listening and general playback scenarios.

Compatible with Standard Studio Headphones

Designed to work directly with 1/4-inch TRS stereo headphone jacks, this amplifier supports headphones with impedance ranges commonly used in professional and consumer audio. It integrates easily into existing audio setups without the need for adapters or special cabling.

Ideal for Studios Classrooms and Training Rooms

This headphone amplifier is well suited for recording studios, podcast rooms, music practice spaces, and educational environments. It enables multiple users to listen simultaneously from a single audio source such as an audio interface, mixer, or playback device.

Compact Design for Easy Integration

Its compact footprint allows the amplifier to fit neatly on desktops, racks, or workstations. The simple layout keeps operation intuitive, making it accessible for both professionals and casual users.