Rupert Neve Designs RNHP - 1/4" headphone output XLR/TRS Combo input

Mackie HM-4 - 1-ch x 4 Headphone Amplifier

TNP Products Headphone Amplifier - RCA Input 3.5mm 6.3mm Output

SYOSI 4 Channel Headphone Amplifier

Morelian AMP-14 - 4-Channel Headphone Amplifier

XUMIUZIY Headphone Amplifier - XLR to 3.5mm Independent Volume Control

Bolanle P2 - Portable Headphone Amplifier XLR/TRS

ASHATA Stereo Sound Mixer - 4 Channel RCA Input and Output

Riworal Headphone Amplifier - 600 Ohm In Ear

Xixian Xixiangumw59trz6 - XLR Input 3.5mm Output

Pilipane Headphone Amplifier - XLR 3.5mm Portable