Pros: Price, Build Quality, Ease of controls, Drives an impacting bass; and improves mids considerably. Quality audio playback, and 24 hour battery life.
Cons: Doesn't help highs improve.
The Fiio E07K Andes DAC and Headphone amplifier is a must have for a beginning audiophile. The quality outweighs the price. It has great value and is a great buy for a powerful, and casual portable amplifier. Also the fact that the amp has a built in DAC for quality audio playback is pretty awesome as well. I will talk about all the positives and negatives about this amp in it's sound quality, build, etc.
The Fiio Company: Fiio is a China-based company that specifically produces headphone amplifiers. Fiio is a very popular company among audiophiles. The most popular amp by Fiio is the Fiio E6, a mini-amplifier that is bought by both regular consumers and audiophiles alike.
The key things you should know is that this is a DAC and a headphone amplifier in one. The DAC (Digital to Analog Converter) is what changes the computer's 1's and 0's to analog (audio, in this case). This provides the "upscale" in your audio format. Basically, a DAC is used with the goal in mind to get the original, best sound quality out of an audio file. One positive about this amplifier is that it has up to 24 hours of battery life when fully charged. Another positive is that the amplifier gives the headphones more driven power, and allowing them to hit all of the frequencies with ease. To have both the DAC and the amplifier in one under $100 is quite remarkable. Now to talk about all the audio benefits; I feel like the bass is the most impacted area when it comes to this amp. The bass is deep and impacting. (It's not overboard with bass though, so don't worry about that.) In addition to deep bass, this amp drives the mids to a completely new other level. The mids are perfect, and are just what they needed to be. I was also very satisfied in the warm, clear sound that this headphone amp produced.
It doesn't do much improve the highs. As I said this amp features more of warm sound signature. There's not much "sparkle". However I think this amp thrives without "twinkle" or "sparkle". It's really just based on preference; but I am a kind of person likes a smooth, warm sound signature with a little bit of bass, which this amp particularly thrived in.
The build quality is purely sleek. A brushed metal look encases the E07K, and there is a glass front with an crystal clear OLED screen. All of the inputs are positioned reasonably. It is comparably sized to an average smartphone. This makes the size pretty beneficial in the aspect that you can strap it to the back of your smartphone when you are out and about and you're listening to music.. It is a pretty sturdy amp as well. Not the glass doesn't appear like it could break like mere iPhone screen glass. (It seems pretty tough.) The amp does not appear bulky or nerdy at all; in fact it looks pretty cool with the glass/metal build. I'm very glad I didn't buy just a big bulk of plastic. I very much enjoy the look and the feel of this amp and its controls.
Specs. (For those analytical people...)
Frequency Range: 20 Hz to 20 kHz
250 mW @ 16 Ω
220 mW @ 32 Ω
36 mW @ 300 Ω
Output Impedance: 0.3 Ω
Gain: Switchable between 0, 6, 12 dB
Bass Boost Range: -10 dB to 10 dB
0 dB @ 2.75 V
6 dB @ 1.38 V
12 dB @ 690 mV
Overall, I think it was a great buy! You can't really go wrong with it. It does great with powering ohm-heavy headphones; and it drives an incredible impacting bass. (For those bass-lovers out there..) I personally love the nice, warm sound signature, and would definitely recommend this amp to a friend. Simply, it just does a fine job at getting an overall better sound quality. The build of it is sturdy, and it's just the right size to be a portable amplifier. Not to mention it's design is pretty cool. I give this amp a 9.5/10, I deducted it half a point because of the amp not improving the highs to the extent that I wanted it. However, it was hardly noticeable with all the other fine sound quality features it portrayed.
My name is Cody, and I hoped you enjoyed my review! If you have any questions/comments feel free to comment down below!