Fiio E11

Advantages: Very high power, quite decent sound

Disadvantages: No separate on / off button, no charge indicator,

Comment: The amplifier itself is not bad, but there is no sense in it, because when it is connected to regular phones and players, the sound will be limited by the quality of the source, it makes no sense to connect it to serious HI FI players, too, so the amplifier is at least as good.

Advantages: Acceptable sound, compact, good bass, high volume, shakes high-impedance headphones, assembled with high quality.

Disadvantages: It cuts the high frequencies, the sound is not very expressive when outputting sound from the headphone jack, and this is very noticeable when outputting sound from a player or phone.

Comment: I recommend outputting sound to the device from the line-out. however, portable devices that have it units.

Advantages: Not bad adds bottoms and details the middle. Made of metal - tested by falling on granite, chipping remained, under it - aluminum. All capacitors are solid-state. Very convenient potentiometer.

Disadvantages: Looks like an iPhone. Can not work and charge at the same time.

Comment: I suppose charging during operation is not possible, because there will be pickups from USB. Were too lazy to screen, but well otmazatsya - charging priority, ostensibly to quickly charge.
I use with sansa clip + and shure srh440. The price is high, took from the enthusiast with hands on Avito new for 2000r. On the basis of the struck - not fake.
On the whole, I am satisfied with the purchase, the headphones have perfectly swung.

Advantages: The power of sound, quietly shook his ears with a resistance of 320h, the build quality, high-quality packaging box, which fit my favorite cigarillos backwoods

Disadvantages: Price: bought for 2700, although it has been stable for about 2 years, we can say that the price is justified

Comment: The main thing when using is to know the measure, otherwise to old age you can become a grouse

Advantages: 1) increases volume by an order
2) sound quality increases: bass depth, treble and midrange
3) I really like the volume knob, it helps to choose the volume if there are not enough headphones ...
4) the charge is enough for you for more than 10 hours, to be honest, I love loud music, but it’s unrealistic to listen so loudly ...
5) you can conveniently stick to the player or smartphone using a rubber band (2 included)
6) you can change the battery anytime ...
7) the assembly is good, there are no squeaks, the body is really made of iron, but very thin, when I fall on the asphalt with a meter and a half I think there will be dents, but it is very light ...

Disadvantages: 1) immediately after the purchase, I advise you to purchase a normal AUX, in general, you can drive to the stock one, but it doesn’t work well if the wire is slightly bent ...
2) for some, the charging connector may be a minus, but it's not a problem either ...

Comment: If you have a vacuum for 900 rubles and other small headphones, I don’t see the sense of the amp, it will increase the volume, but the sound of the norms will not give ... You need GOOD headphones ... I personally use the amp in conjunction with a tablet or phone I do not think that the player for 3000 rubles. can also shake powerful headphones ... For those people who love loud and high-quality music, just such a thing is needed ... Portable hurricane music in your pocket ...

Advantages: 1. Really enhances the sound. Even at 4 positions out of 8, headphones (Creative Aurvana 2) drown out all the extraneous sound. In addition, more precisely distinguishes the frequency ranges.
2. Lightweight and compact. I cling to my iPhone with the integrated gum. In the pocket of a jacket or a loose jacket, there is almost no doubling of the size of the phone.
3. Convenient management. The wheel instead of buttons allows you to choose exactly the signal level that is needed.
4. Perfectly assembled. All parts of the body fit perfectly. Battery cover nelyuftit. Opened it once to look at the battery (really BL-5B).
5. Good equipment. A beautiful metal box (inside which the above-mentioned gum holder is hidden, charging cord (cheap, but knows its business) and audio cable.)
6. Good price. Bought in the USA. With delivery did it in 80 bucks. We have a little more expensive, but also for the available money. And he is worth his money.

Disadvantages: The main drawback is the work time. Squeezed to dry in one day (approximately 9-10 hours of constant hearing).
A minor flaw, which revealed when opening the battery cover: dust enters through the hole to hook the cover with a fingernail.

Comment: I have been using it for almost half a year. Melodies sounded new. Prior to this, I mainly used the player for music, because iPhone in terms of sound quality did not please me. After the purchase, I forgot about the player. The sound was not only louder, but more precisely, brighter.
For iPhone, iPod owners, I recommend immediately purchasing a LOD-cable L9 / L10. This will improve the sound a bit more.
The sound of the hardware equalizer did not like. Therefore, no complaints about the buttons of the equalizer recessed into the body. Although when dressing a rubber ring, they are easily shifted. Instead of a hardware equalizer, I use software - SonicMax Pro.

The only thing that is worth remembering before buying is an amplifier needed for high-quality headphones. Do not buy it for complete copies. The sound, of course, will change for the better. But to buy an amplifier for the triple price of the writers is stupid.

Advantages: Price
Sound
Reliability

Disadvantages: Ergonomics
Working hours

Comment: I liked the ability to replace the acb, it is quite common.

I did not like it, that it can not work and be charged at the same time.

I also did not like the location of the two inputs on the same side with the wheel for adjusting the sound.