The Samson S-amp is a low-cost, portable, 4-channel headphone amplifier, featuring individual output volume control knobs. The input and output connectors are of the 1/4" stereo type, and the S-amp works with a wide variety of headphone models and impedances.
Portable miniature 4-channel headphone amplifier
Separate volume control knobs for each output
Supports wide variety of headphone impedances
Standard 1/4" stereo input jack for connection to mixer headphone outputs or
headphone amplifiers