CYMUM CY-15 HiFi Portable Headphone Amplifier for iPhone 7 to 3.5mm Adapter Earphone Amplifier Smartphone Audio Amplifier (Silver)

Its amazing how small this device is. However , even all it is very small it gives off a very large feeling of being very well made in fact a huge feeling and aura of quality. It is a very simple plug and play device that produces a strong warm sound with evqery style of music i have played through it . As far as inexpensive Amp/Dacs go , Im in know way a music or music player hard ware expert , but I do know what sounds and feels good to me, and this little thing has to be one of the best bang for the buck Amp/Dacs on the market. Im going to be very interested in reading any ones negative reviews if they should appear as to what and why they might have anything negative to say?, especially for the money spent, I cant find even one thing to complain about . It works and sounds great! In a package that is compact ,rugged, simplistic and very good looking. I wasnt expecting much for 50$ and what I ended up getting was very impressed. I carry it with me and plug it into what ever im listing too . Mostly my car and home stereo set ups using my cell phone and spotify as the source and it impresses me every time.

I don't write reviews often but when I do it is serious. This thing is AMAZING!!!!! I'm very big on working out and I need loud loud loud headphones. A few things first. I have the iPhone 7+ and the Bluedio T3 headphones while Spotify is my music player of choice with the music quality at extreme. Now I need loud music when I workout. That's it. Just for the good hour or two I need it loud and intense. Stock headphones on the iPhone let way too much background noise in. The Bluedio's themselves are great but still they need some power to push them to get that nice punchy bass and clean crisp notes. If anyone and I mean anyone who is looking for a quick, small, effective, inexpensive, way to boost the sound of your current wired headphones please buy. I will be buying another unit. Now of course your not gonna have the good without the bad. Very minor and I mean very minor. I have the soonest case you can have on an iPhone. The lightning port connector is just a tad bit too short so it doesn't connect correctly, so I had to shave it down so I gets that snap when you plug it in. That's it. I just wanna say thank you to the creators and manufacturer. You made the best accessorie for the iPhone 7 line.

This didn't work for me because it ended up being to heavy for the headphone cord to support. It is really cumbersome to work with.

Excellent... You will notice an increase in the battery drain; however, the enhanced sound is very apparent! Music sounds much, much better using this small device.

I took a chance on this product and i like it. I will give it a 5 star review if i dont have any problems with it.I was looking for a dac that is small and portable the workmanship on this product is very good. It does work as promised. I am not an audio expert but it performs comparably with other dacs i have used.This dac doesnt have its own battery and feeds off the power provided by your device. To me this was a plus since i wanted a small package.I have used it with no problem with my sony xperia z1 and also on nexus 6P . On 6P u will need a different cable or a usb-c OTG adapter. If not otg it wont work.

This is an extraordinary device. I highly recommend it for rockers who want it sweet and loud. It's a great value and I'll never be with out one.

Purchased the Beyerdynamic DT-770 80 Ohm and knew within an hour I needed a portable amp to truly appreciate those headphones using iPhone 6s. Was tempted to go the Fiio route because it had so many review but really wanted something that would a) not need to be charged separately and b) wouldn't be an impediment to me walking around NYC.This worked out well, very small (think USB drive) and doesn't risk stressing lightning port or your headphones if you just walk around with it inline and dangling with your headphone cable.Only worry is how much this would drain iPhone battery, will update review with some real world numbers.

Very clean sound with no distortion at high volume. It drives perfectly high impedance headphones like Sennheiser HD600 and process hi-res audio files right from the iphone.Don't require charging and Iphone battery consumption is minimal. Excellent customer support.