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Amazon.com: summina 6-Channel Stereo Headphone Amplifier Compact 6 Channels Mini Audio Stereo Headphone Amp with 6.35mm/3.5mm Input Volume Control In-ear Monitoring System for Stage and Studios : Musical Instruments
Behringer Powerplay HA6000 6-channel Headphone Mixing/Distribution Amplifier Bundle with Hosa MHE-325 3.5mm TRS Female to 1/4-inch TRS Male Extension Cable - 25 foot | Reverb
ART HeadAmp6PRO 6-Channel Rack Mount Stereo/Mono Headphone Amp w/EQ & AUX Outs | Digital DJ Gear