![Amazon.com: Neoteck Portable 3.5mm Headphone Amplifier with Bluetooth 5.0 Receiver, Two-Stage Gain Switch, 16-150 Ohm HiFi Earphone Amp, Aluminum Matte Surface : Electronics Amazon.com: Neoteck Portable 3.5mm Headphone Amplifier with Bluetooth 5.0 Receiver, Two-Stage Gain Switch, 16-150 Ohm HiFi Earphone Amp, Aluminum Matte Surface : Electronics](https://m.media-amazon.com/images/I/61LeiO-1aUL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Neoteck Portable 3.5mm Headphone Amplifier with Bluetooth 5.0 Receiver, Two-Stage Gain Switch, 16-150 Ohm HiFi Earphone Amp, Aluminum Matte Surface : Electronics
![Monolith by Monoprice Liquid Gold Balanced Headphone Amplifier and DAC by Alex Cavalli - Monoprice.com Monolith by Monoprice Liquid Gold Balanced Headphone Amplifier and DAC by Alex Cavalli - Monoprice.com](https://images.monoprice.com/productlargeimages/389671.jpg)
Monolith by Monoprice Liquid Gold Balanced Headphone Amplifier and DAC by Alex Cavalli - Monoprice.com
![Amazon.com: TNP Portable Headphones Amplifier Stereo Headphone Earphone Amp Volume Control Audio Booster with RCA Input 3.5mm 6.3mm Output Jack & Power Switch : Electronics Amazon.com: TNP Portable Headphones Amplifier Stereo Headphone Earphone Amp Volume Control Audio Booster with RCA Input 3.5mm 6.3mm Output Jack & Power Switch : Electronics](https://m.media-amazon.com/images/I/71ZqsjAsz+L.jpg)
Amazon.com: TNP Portable Headphones Amplifier Stereo Headphone Earphone Amp Volume Control Audio Booster with RCA Input 3.5mm 6.3mm Output Jack & Power Switch : Electronics
![Amazon.com: Douk Audio U3 Headphone Amps, Mini Hi-Fi Amplifier for Home Desktop PC 6.35mm / 3.5mm Headsets, Class A, RCA Input, DC 5V : Electronics Amazon.com: Douk Audio U3 Headphone Amps, Mini Hi-Fi Amplifier for Home Desktop PC 6.35mm / 3.5mm Headsets, Class A, RCA Input, DC 5V : Electronics](https://m.media-amazon.com/images/I/61Q-w-nktiL.jpg)
Amazon.com: Douk Audio U3 Headphone Amps, Mini Hi-Fi Amplifier for Home Desktop PC 6.35mm / 3.5mm Headsets, Class A, RCA Input, DC 5V : Electronics
![Amazon.com: Headphone Amplifier, Portable HiFi Headphone Amp 3.5mm Stereo Audio Gain Switch Support Impedance 16-300Ω Headset for MP3/MP4 /Phones/Digital Players/Computers/Xbox one,PS4,PS5 Controller : Electronics Amazon.com: Headphone Amplifier, Portable HiFi Headphone Amp 3.5mm Stereo Audio Gain Switch Support Impedance 16-300Ω Headset for MP3/MP4 /Phones/Digital Players/Computers/Xbox one,PS4,PS5 Controller : Electronics](https://m.media-amazon.com/images/I/71hdGdFy-6L.jpg)
Amazon.com: Headphone Amplifier, Portable HiFi Headphone Amp 3.5mm Stereo Audio Gain Switch Support Impedance 16-300Ω Headset for MP3/MP4 /Phones/Digital Players/Computers/Xbox one,PS4,PS5 Controller : Electronics
![Amazon.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 : Electronics Amazon.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 : Electronics](https://m.media-amazon.com/images/I/61FxRk8T47L.jpg)
Amazon.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 : Electronics
![microZOTL MZ3 Headphone Amp / Preamp / Integrated Amp - Vacuum Tube Headphone Amp by Linear Tube Audio microZOTL MZ3 Headphone Amp / Preamp / Integrated Amp - Vacuum Tube Headphone Amp by Linear Tube Audio](https://images.squarespace-cdn.com/content/v1/551c5a82e4b0c1e6d1556b74/1571347710496-MR0YJV3DN1JHFIJG5IJE/MZ-3+on+white-001.jpg)
microZOTL MZ3 Headphone Amp / Preamp / Integrated Amp - Vacuum Tube Headphone Amp by Linear Tube Audio
![Amazon.com: Mackie HM Series, 4-Way Headphone Amplifier Mixer Accessory 1-ch x 4 Headphones (HM-4) : Musical Instruments Amazon.com: Mackie HM Series, 4-Way Headphone Amplifier Mixer Accessory 1-ch x 4 Headphones (HM-4) : Musical Instruments](https://m.media-amazon.com/images/I/71RYPOsP0FL.jpg)
Amazon.com: Mackie HM Series, 4-Way Headphone Amplifier Mixer Accessory 1-ch x 4 Headphones (HM-4) : Musical Instruments
![Amazon.com: LVY Headphone Amplifier A010 Portable Headphone Amp 3.5mm Audio Rechargeable Two-Stage GAIN Switch HiFi Headphone Amplifier Compatible MP3/4, Phones, Computer and Various 3.5mm Audio Digital Devices : Electronics Amazon.com: LVY Headphone Amplifier A010 Portable Headphone Amp 3.5mm Audio Rechargeable Two-Stage GAIN Switch HiFi Headphone Amplifier Compatible MP3/4, Phones, Computer and Various 3.5mm Audio Digital Devices : Electronics](https://m.media-amazon.com/images/I/61rZ9xKYhnL.jpg)