eSynic Professional 16-300 Ohms Bass Headphone Amplifier 3.5mm Portable Headphone Volume Amplifier Rechargeble Headphone Amp Aluminum Matte Headphone Amp With Bass Boost Function for MP3 MP4 Phone etc

I bought this for my Sennheiser HD800S headphones and it makes the sound much fuller and easily boosts the base up. Im using two equalizers on my phone to further increase the sound and fine tune what I want to hear. This does exactly what I need it to do. Very happy.

Does EXACTLY what i wanted, louder sound from my headset , WOW it is so much louder than i expected, this turned my crap headset into a premium headset

I've purchased several headphone amplifiers in the past and never was too satisfied with the performance.I was quite surprised by the sound quality(especially bass) of the eSynic amplifier.Well worth the price.

Definitely drives my aful explorer iems to their full potential. Especially with the bass boost. Would definitely recommend

Wasn't 100% sure this little amp would do the trick for the application I purchased it for, I had a line level out device I needed to boost the level to what essentially amounts to a headphone out level, but sure 'nuff, it did! So for my needs this little mini amp was just what I needed. No need for me to worry about finding an extra plug either,since it's possible to charge this amp with a usb cord (provided) and so far, i've used the little amp for hours on end, & the little blue LED is still shining bright, indicating to me, the unit is still sufficiently holding a chargeA selling point for me (for this device) was it accepted a 1/8" minijack as an input, which was my criteria for selecting, and also has an output level adjuster, which I felt may come in handy if the signal was perhaps too hot after amplifying the level in, but as it turns out, the amp was just enough to bring the level in line to feed the intended line out signal to my music visualizer, and no further adjustment was needed, so - while I had to spend a few extra bucks to get my music visualizer to function as intended, this little amp will work for that application, and can/will serve as a portable amp on the go should the need arise as well.The device itself was well packed, comes with the charger cord, as well as another small patch cord to connect to whatever device you're feeding the signal from, & all & all, I'd recommend this amplifier if you're looking to amplify a low (ie: Line Level Out) signal to a usable signal to listen to headphones with.

This little unit packs a punch. We had volume issues with our mini projector. If we ran the audio through the projector it was not loud enough to hear. Plugged this thing in from the projector output and POW! Huge difference. Nice little unit IMO.

It isn't the greatest one, but so far, it's doing what it says it will do quite well. For the price this is a good buy!

Works as described