Fiio E12 Mont Blanc

Advantages: Design, equipment, price, sound for portable is decent, the charge keeps as stated. During charging, you can continue to use.

Disadvantages: When you change the volume is not strong interference in the ears, if you do not touch everything ok. Stupid and unnecessary for me functions like bass and crossfeed. The minijack cable changed almost immediately.

Comment: I work with German Matstro GMP400 and AKG K701 - normal flight. Scene, detail, balance suit. Price-quality is a good choice for those who want to feel the difference with the amplifier and without spending much money. Now I choose a stationary amplifier. A good source or DAC is desirable.
PS. The best result is the PC -irDAC (2.2 V output) -Fiio headphones, from a Fiio AKG mobile phone is no longer pulling. With Denon DBT-1713UD, the result is good

Advantages: Awesome portable amplifier. The power is such that sometimes you forget that it is portable. By connecting to a good source, with a good interconnect cable it will shake pretty tight headphones. In Gain mode 16dB there is no hint of any noise or noise in the Gain mode. even on complex saturated genres, without smearing the rest of the range. Middle and high are worked out neatly, detailing is present along the entire length of the frequency response.

Disadvantages: For $ 130, they are simply not there! The device sounds much more expensive than its price, and is quite adult.

Comment: It is pleasant to hold in hands, a good build quality. After the FiiO E11 is a huge leap in sound quality, there is not even a desire to compare these two devices.

Advantages: The ability to use portable headphones up to 300 ohm, metal case, capacious battery, cross.

Disadvantages: Not yet discovered.

Comment: I spend a long time behind the wheel, it happens on different cars, where there is no radio tape recorder or I carry my colleague, but our musical tastes do not coincide, he listens to music with headphones and, not to interfere with each other, decided to buy open headphones monitor) GermanMAESTRO GMP 400. My FiiO X5 player does not disclose such 300-ohm headphones, without the help of Fiio E12. The amplifier, in addition to additional power (Gain), makes it possible to make the bass deeper (BASS) and put together an orchestra (Crossfeed) (stereo fanaticism on some compositions is frankly annoying). Honestly, continuously working 12 hours with all the gains. Of course, you won't put such a sandwich in your back pocket, but it looks like the spy equipment of a CIA agent: https://www.youtube.com/embed/SBCyj1OdH3k