TNP Portable Headphones Amplifier Stereo Headphone Earphone Amp Volume Control Audio Booster with RCA Input 3.5mm 6.3mm Output Jack & Power Switch

What can I say? This is a very simple device that has one function, to boost the volume level of a headphone output. I added a Bluetooth receiver to my cars sound system that’s connected to the AUX port. The issue is that the volume level of the device is in the low end, which is quite noticeable when switching between AUX and an FM radio station. With this device I was able to get my Bluetooth input device at the perfect volume level. It’s crystal clear and I haven’t noticed any sort of audio noise. It’s also a pretty compact device which makes car installation easier. It comes with a USB power cable as well.

I was looking for a small stereo signal audio amplifier for our small flatscreen TV in our kitchen. The internal speakers for the TV are in the back so there is not much volume. I tried hooking up some small "Logi" computer speakers to the "earphone" 3.5 jack on my TV, but the volume was still not very good. I found this little amplifier online at Amazon and decided to try it out. I hooked the audio amp into the "earphone" jack with a spare 3.5 cord I bought, then connected the output to the spare speakers and I now have GREAT volume! So far it is working great, so I have ZERO dislikes. I would for sure buy this again.

Great amp if desktop audio is too quite. Its just as good as my Scarlet solo interface in boosting headphone audio. very clean audio. It can be hooked up to a power bank on the go but I think its stretching the word "portable" compared to other interfaces that you can put in the same pocket. I need something a little different with different inputs but for what this offers for under $30, it does its job well

I got this for a family member who has severe hearing loss. I had already set him up with in ear headphones plugged in to the tv with an independent volume control for him. We still had to set the TV extra loud so the volume would increase in the headphones. Now with this device the TV Volume can be low, and he can make it loud enough in his headphones. It works so well that he doesn't even need to set it at the maximum volume.

I would recommend this amplifier. This is my third ever headphone amp I have owned and this one does exactly what I want. Here are the cons: It is large. Larger than the palm of my hand, No rechargeable battery. You will need a power bank if you take it on a walk with you, It is made of cheap material. Feels like a hollow tin can, No usb cord provided. You can either plug it in to the wall with the provided plug or use a micro usb cord. It will power the unit fine. The pros: It has a rotary power and volume knob! Ok old schoolers...here me on this one....does anyone miss the practicality of the much missed volume knob! I do!! Soooo easy to find in the dark or I'm my case if you are driving. I have this unit hooked up in line with my phone so I can amplify the audio from my phone to my car speakers. Sounds amazing! And I managed to wire it to my fuse panel so it shuts off with the car ignition. Just buy a cigarette lighter adapter and wire that adapter to an ignition source. Very simple. If you buy this amp, it will in fact increase your headphone or car speaker volume. And it sounded good. Just remember it is fragile. But it reminds me of some lost and forgotten 80s audio equipment, but man I gotta tell ya I love it!

Purchased in July 2018 for use as a bedside headphone amp so my wife or I could watch TV silently at night while the other sleeps. It worked just fine for about a year, then the power started cutting out. The power adapter jack felt loose so we switched to the micro USB power port (nice extra feature BTW) and it continued working alright. Then several months later the audio started cutting out on one side. We tested different headphones to rule out that possibility. Then we found that it seemed the audio would come back by pressing on the box itself (???) like there is another loose connection to the headphone jack that can be temporarily fixed by physically squeezing the box. Finally the USB power port broke with the plug coming out of the box altogether so it's completely dead now. The amp features and sound are just fine, but the build quality is quite bad because of the aforementioned problems.

It works as advertised at a great price.

Decent little amp for boosting stuff with low output. Sound quality at high levels is not great with a fair amount of noise (hissing). Works decent in my application (monitor+roku+speakers).