General

Overview of AMP7 and AMP8 discrete amplification modules for iBasso players

IBasso does not stop at what has been achievedresults and continues to produce one successful amplifier after another, and, judging by the news, non-trivial solutions were used. While the variant with the NuTube microlamp is in development, let's talk about modules with discrete amplifiers that have received the AMP7 and AMP8 indices.


Inside both amplifiers are similar, usedproprietary development based on transistors with low saturation voltage, allowing to achieve not only a good voltage sweep, but also a decent current efficiency. According to the developers, transistors are manually sorted in pairs to achieve the best performance. AMP7 uses a conventional 3.5 mm connector, and AMP8 - a balanced Pentaconn, and their characteristics vary accordingly, being a balanced model, the “eight” offers a greater voltage swing. Also, in theory, AMP8 has a better channel separation and a signal-to-noise ratio, but, in fact, for both modules, these parameters still lie outside the range of human hearing. Despite the difference in construction, the cost of the modules is not different and amounts to approximately 15,000 rubles.

Specifications

AMP7

  • Amplifier operation time: ~ 7.5 hours
  • Frequency range: 10 Hz - 45 kHz ± 0.3 dB
  • Output voltage: 3.2 Vrms
  • Signal to noise ratio: 122 dB
  • Common harmonic distortion + noise: 0.00023%
  • Output Impedance: 0.3Ω
  • Dynamic range: 122 dB
  • Channel separation: 106 dB

AMP8

  • Amplifier operation time: ~ 7 hours
  • Frequency range: 15 Hz - 45 kHz ± 0.3 dB
  • Output voltage: 6.2 Vrms
  • Signal to noise ratio: 125 dB
  • Common harmonic distortion + noise: 0.00023%
  • Output Impedance: 0.38Ω
  • Dynamic range: 125 dB
  • Channel separation: 120 dB

The boxes remained unchanged: black cardboard, gray paper strip around. Inside is the amplifier module itself, a screwdriver (I already have a collection of them), spare screws and a warranty card.

Installation is very simple: loosen the screws (do not completely unscrew them), remove the module, put a new one, gently tighten the screws back. It is, of course, very desirable to do this with the player turned off.

With these amplifiers, the iBasso DX200 time in my measurements was 6 hours 55 minutes with AMP7 and 6 hours 25 minutes with AMP8.

Sound

Most of the tests of these modules I spent withiBasso DX200, firstly to reveal their potential, and, secondly, of all the modules with the DX150, I subjectively like AMP6 most of all, this couple has some special synergy.

The total pitch of both amplifiers is different.with some “analogy” of color, they smooth out sharpness a bit, but at the same time they add a bit of emotion, providing the music with pressure and drive. The difference between 7 and 8 is not great, in fact, we can safely say that it consists in power, and if the headphones are sensitive, then the differences when comparing at the same volume can not be heard. Naturally, the same volume should be set using the sound level meter, and not by the numbers on the player's screen.

Also, both modules differ in a darker background with respect to AMP1, they have a slightly lower noise level, which also contributes to the effectiveness of their sound.

Discrete modules add low bass to some depth andweight, which in turn gives some increase to the "monumentality" of sound. This increase is given due to a slight decrease in resolution, but the bass still remains detailed. Also, as compared with AMP1, the attack speed at low frequencies slightly increases.

Mid frequencies get a small boostwidth of the imaginary scene and a bonus in the form of stressing emotions. The emphasis on microcontrasts is slightly reduced, but this reduces the criticality of the player to the quality of the material, which is often a problem for the stock DX200. In general, the sound shifts slightly from neutrality to a more “taste” pitch, but this sounds very enticing.

At HF, the length and the “layering” are slightly improved, which gives the listener a slightly more natural study of overtones and attenuation.

findings

In general, iBasso does not care about itsIt’s not easy for buyers to make their difficult choices: each amplifier module is good, and choosing the “best” one is almost unbelievable, but the “seven” and “eight” probably deserve this title to the maximum. At least until the company has released something new, but it is clearly preparing for them.

Buy iBasso AMP8

</ p>