Mackie HM-4 Headphone Amplifier
Mackie
Bolanle PH400 Headphone Amplifier 4 Channel for DC 5V 3A Power, 8 Headphone Output Port, Headphone Amps with Mute and Stereo for Studio and Stage
Bolanle
Zoom ZHA-4 Handy 4-Channel, Battery-Powered Headphone Amplifier with Volume & Mute Functionality, Portable, for Podcasting, Music, Productions, and More
Zoom
COKYISS High-Fidelity 8-Channel Headphone Amplifier – Ultra-Compact Stereo Headphone Amp with Built-in Equalizer & 8 Output Channels and 1 Input Channel,Metal
COKYISS