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E7 Highlights
6 core competencies for first-class sound quality
As a flagship DAP with interchangeable modules, the E7 has the following core features, among others:
① Huge analog circuit area of the plug-in card: industry-leading PCBA area, no headphone jacks to use all the space for analog components;
② Remaining stocks of the AK4497 chip: AK4497 × 2, from the selection of components to the optimization of the power supply, the performance of the entire machine exceeds the typical values of the chip
③ "Intoxicated" amplifier architecture: doubling of amplifier chips, appropriate voltage reduction, strengthen the output current, the whole machine gets the highest level of control, low resistance and high sensitivity make the E7 more IEM-friendly.
④ Multidimensional coordinationto satisfy even the most demanding listening experiences: Deep self-developed harmonic tuning and high dynamic mode, combined with low distortion mode, can be freely switched to suit different headphone categories and listening preferences;
⑤ Better use of the pure sound system "LP OS": The advantages of non-Android are lower power consumption in the digital part, less interference and, above all, more valuable power for analog circuits;
⑥ Better sounding Bluetooth module with protocol stack: an important extension that allows the E7 to achieve a streaming experience by leveraging FPGAs, classic Bluetooth audio chips and Lepi's new generation of algorithms to optimize the listening experience.
2 versions: AK4497 Standard & Exclusive Edition
Debuting with the 4497 module, the E7 will be available in two optional versions - Exclusive and Standard.
Exclusive Edition
- <-120dB distortion plus noise exceeding the typical value of the DAC chip
- >130dB dynamic range
- precise op-amp voltage adjustment that adapts to different headphones
- fully functional "Music Tuning" - Harmonics Tuning + High Dynamic Mode + Low Distortion Mode
- PVD gold brass buttons and the engraved "EXCLUSIVE" logo on the AK4497 module.
standard Edition
- <-117dB distortion plus noise
- dynamics >127dB (such performance is rare in the use of AK4497 DAC portable models)
The future is even more exciting!
Whether Select Edition or Standard Edition, there are only a limited number of AK4497 modules shipped with the E7.
When developing the E7, we discovered that the only 4497 chips available on the market can contain discrete chips even in the same batch and at different times.
The higher the power, the greater the dispersion can be. If you want to use two pieces of 4497 to -120dB distortion, single screening from the chip that the body, already very few, and then to achieve the adjustment, technically can be said to be much more difficult, so the actual number of the hand-picked version of the E7 is very low.
E7 is the new flagship of the E series, but also a new starting point, AK4497 is the first audio module of the E7, more new architectures, new ways of playing, new possibilities, will be realized in this piece of "good land" with great potential, so look forward to it!
