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.
S-amp - 4 Channel Stereo Headphone Amplifier
1 x 18 Volt AC Adapter
Limited 1-Year Warranty