Neoteck Portable 3.5mm Headphone Amplifier Two-Stage Gain Switch, 16-150 Ohm, Aluminum Matte Surface

Wonderful! This is a nicely designed headphone amp with enough power to drive headphones. However, check to see what hind of power your headphones need because these could be overkill (it’s not needed to drive earbuds) but may not provide enough power for large power hungry headphones.Positives:- it charges fast with USB-c- it’s simple to operate- the connectors connect with authority. Your jacks won’t accidentally fall out on their own- long battery life- flat design, conducive for stashing in a pocket- doesn’t seem to modify/degrade music clarity- perfect sizeNegatives- somewhat sharp corners, not good for stacking a music player or phone. I put tape on the sharp corners- The biggest negative for me is the volume dial, it is easily moved in a pocket. ANYTHING with a dial that is designed for a pocket should have strong detents so it won’t accidentally turn as it moves around in your pocket. Things like this amplifier should always come with strong detents or a dial “lock” so you don’t accidentally blow out your ears. It has happened to me a few times where the dial turned while in my pocket. It was not fun.

Bought this to enhance the audio of my roku device while working out on my treadmill. The volume is great which enhance the audio on my bluetooth ear plugs and the regular earpiece. This runs on battery so if you plug it in while using, you will hear a lout buzzing noise. Tip to overcome this buzzing noise is to plug the unit on a different ac extension cord which is not the same one you main source of audio is on. Prize is also reasonable

Nothing fancy, but does the job. I use it to connect earbuds to my electric cello. When plugging earbuds into the port in the instrument, the signal is too weak to hear much in the earbuds. The little amp boosted the sound and was small enough to hang from the port. Very simple -- volume control only.

Works as described without introducing interference. Battery holds a charge well, and charges quickly. My hearing is degrading, and so these have been helpful for me.

HO- LEE COW. Best $$ I ever spent. My headphones SING with this amp. I haven't turned it past 6- EVERYTHING is exactly the volume it needs to be, for my taste. I like my tunes loud, and this thing absolutely delivers. AND it doesn't need a continuous power source. Just charge it and tune out the entire PLANET! LOVE this thing. Don't hesitate to buy!

It works like its supposed to

Purchased this unit in Dec. of 24. It's May of 2025 and it's already falling apart. 1/8” connector gets pushed into the casing causing the connection to be weak. There is often static when turning the volume knob. The only good thing I can say about the unit is that a charge lasts a long time.

Works well but adds audible noise