I wish Sonic was carrying these when I bought mine. I have two of these which I use to amplify the the headphone-jack output of an mp3 player going thru an 3.5mm-to-RCA Y-connector into the RCA input of a car amplifier (mp3 mounted on handlebar of a MoTo going to a car amp). Especially if you have to branch the two outputs further into 4 outputs for a 4-channel amp, because doing so further halves the voltage. The battery-life on these things is friggin' great. I'll forget about charging it for a long darn time until one day it shuts-off, and I go "Oops!". They seem to stay charged for quite a long time during periods of no use as well.

FiiO E5 is used as a "pre-amp" for a pair of Logitech external powered speakers hooked up to my large Sony flat screen TV. My previous TV had a "headphone out" jack, but the new one does not. Having only an Audio Out jack, the signal level was too low to really drive the speakers. So I used Velcro for the E5 to the back of the TV, Audio Out to E5 input, E5 output to external speakers. E5 volume up, and the external speakers really kick. Sounds great!

I like this product. It is very neat and well designed. It has minor drawbacks, but overall my experience is very positive. It works as intended, is simple to use.

Amplifier works great. I use it to monitor what I am recording.

I have never written a review on any product. This one has me impressed! I was not expecting too much, but it really works! All i wanted was a little boost so i gave it a try. I works great and it works even better if u can have it charging at the same time you are using it. works great on headphones and well as a axillary input.I would recommend it to anyone wanting a boost in their sound.I use it all day in my work truck, and at home on my headphones. I don't know about the battery life, but others use aa battery's. I just didn't want to mess with them. Great product for the price!!

so i bought the amp about 6 onths ago and man its beast... makes your ****ty head phones sound like you have some subs in your ears... i kno its not god for some ppl... but for bass heads like me they are perfect.... will buy the bigger one in the future..

Great product, small and light weight. Bought mine for use with my headphones while watching tv, because the signal coming from my TV jack was at a set volume. This product worked great, now I have more than enough volume and the sound is much better. I even use with my ipod...great sound improvement.

My first amp, love it, it's a good portable amp and has great price-value

I love this amp, it's small, has rechargable battery and has bass boost, would recommend.

This product was exactly what I was looking for and works great. It's pretty clean sounding and very useful and had a very reasonable price.

Works well and is easy to use. No problems at all.

I ordered this because the signal from my sat radio was not strong enough from the sat radio to my headset on my motorcycle helmet. I used it all summer and it has been great. Sound quality is good the volume is good even at 80 mph (not that I drive that fast, lol) battery life is good too

I got this 2 weeks ago and so far i love it. This thing really bumps! I read TONS of reviews, and they all seemed to point to this model. The price is excellent! Highly recommend to ANYONE who wants to improve any headphones they have!