Audio-Technica ATH-M50x Professional Studio Monitor Headphones (Black) Bundle with Blucoil 4-Channel Headphone Amplifier, Aluminum Headphone Hook, and Slappa Full-Sized HardBody Pro Headphone Case
Mackie 402vlz4 4-channel Ultra Compact Mixer With Headphones And Cables : Target
Headphone Amplifier Donner 4 Channels Metal Stereo Audio Amplifier,Mini Earphone Splitter with Power Adapter-4x Quarter Inch Balanced TRS Headphones Output and TRS Audio Input for Sound Mixer-DEL-4 - Walmart.com
Fifine Headphone Amplifier 4 Channels Metal Stereo Audio Amplifier,Mini Earphone Splitter with Power Adapter-4x Quarter Inch Balanced TRS Headphones Output and TRS Audio Input for Sound Mixer-N6