eSynic Headphone Amplifier Portable Amp 3.5mm Gain Switch Audio Rechargeable HiFi Earphone Headphone Amplifier with 1.2m USB Cable and Lithium Battery (Style-C)

I like to watch movies on the weekends on my portable dvd player with my headphones, the problem I have is I can't hear the movie clearly with the volume turned all the way up. I suffer from tinnitus so it makes it difficult to hear the movie, but with headphone amplifier it changes everything. Best money I ever spent!!!!!!

It works. This device has a simple task and it functions as described and expected. Glad I got this! I do with the delivery people in Brooklyn would STOP leaving packages outside of my building!

I was looking for a amplifier to improve my Tablet's and PC"s volume with my wired headphones. This ESynic Headphone Amplifier works great. It arrived quickly, no problems with package or delivery. All parts were in box as described. Charged the unit to full, used the 3.5 to 3.5 cable provided to plug into my android tablet and plugged in my AKG K240 and instantly I noticed a marked improvement in volume and fullness to the music. It has two gain settings (low and High), and I have only needed low. I do not notice any change in sound quality other than the increased volume. So it is a good purchase and I recommend the unit ( I will update this review if anything changes). A bonus improvement is that the tablet volume is much easier to control using the knob on the amplifier and that alone almost is worth the purchase! I also have used on my PC and have had the same results. Works great.

works as advertised. Very happy with purchase

Works great.

This review is written by the end recipient and posted by the purchaser.A review of the product, Brand: eSynic Headphone Amplifier Portable Amp 3.5mm Gain Switch Audio Rechargeable HiFi Earphone Headphone Amplifier with 1.2m USB Cable and Lithium Battery for MP3 MP4 Phones, Digital Players, and Computers. Model Name: ESYDAC043After buying three units of this model, the last one sent to me was not functional at all. As to the fact of why I had to purchase three, to begin with, the first one I’d bought lasted roughly two and a half years; it worked well up until the female jack for the headphone came off the unit’s circuit board. So, I ordered another one. After only a few months, the same thing happened. (Take note: I keep the product in a cushioned pouch, and I did drop the pouch.) I decided to take it apart and discovered that just a hair of solder had been used to hold the female jack in place on the board. Even so, I did like this product and had a friend order another one for me. When it arrived, this one didn’t work at all. I could only guess the jack must have come loose during shipping. And it’s not an easy task for me to do returns, so I opened that unit up too. And again, I saw the problem, virtually no solder had been used on the female jack. Apparently, what was on the circuit board wasn’t enough to keep it in place to the board itself. (It probably did come off during shipping.) And as far as flux goes, there’s really no way for me to judge how much flux was used...but all-n-all, I believe the solder job was incorrectly done. And I’ll say again; it’s difficult for me to do returns because I am at a Civil Commitment Center. I understand that most electric components must be returned in the original packaging, and the mail room usually destroys it. I couldn’t afford to take a chance in buying another one, the money was adding up, so I went ahead and ordered a different amplifier from another company, and it’s working great.

Louder volume but no increase in sound quality for me. Was using it as a pre-amp from my dash mount Android Auto screen to my head unit's aux input, but it still didn't sound as good compared to using my head units USB input

This particular band works good. I bought a similar one that was poorly built and failed completely apart.