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Delivery time approx. 2 weeks.
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 stock 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 the 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: a key enhancement 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.
3 versions
Debuting with the 4497 module, the E7 will be available in two optional versions – Exclusive and Standard.
AK4497 Exclusive Edition
- <-120dB distortion plus noise that exceeds 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.
AK4497 Standard Edition
- <-117dB Distortion plus noise
- Dynamic range >127dB (such performance is rare in the use of AK4497 DAC portable models)
AD1955 Edition
It's a decoder and amplifier card featuring two legendary ADI AD1955 cores. The E7 also marks the first application of this classic flagship ADI core, which hasn't been updated in nearly 20 years, in the portable hi-fi space.
Four distinctive characteristics
Unique feeling of high class
The dual AD1955 chips are used for the first time in portable players and allow owners to to experience the original "1955 sound." The new E7 is a great complement to the E7, with its clear, distinctive, and high-quality sound.
Powerful single-ended with a difference
The single-ended circuit of the two AD1955s works in such a way that volume control, op-amp buffer circuit and dynamics are identical to those of the balanced output.No matter which jack you plug your headphones into, you'll hear the uncompromising 1955 sound of the new E7.
Uniquely linked LOs
The LOs of the new E7 are optimized for EA4. EA4's proprietary LO enhancements were so well received on the P6P 10th Anniversary Edition that they are now also available on this AD1955 card. We've added the proprietary LO enhancement design expertise of the limited-edition model to the AD1955 card, thus realizing the dream combination of the E-Series bundle (E7 + EA4).
Consistent listening pleasure
The AD1955 board features a specially designed, fully discrete automatic bias compensation circuit for a consistent listening experience. We've engineered a comprehensive circuit around the AD1955 chip, consisting of discrete components such as transistors, MOS tubes, and resistors, to automatically adjust and compensate for various audio settings. Depending on the different audio settings, appropriate automatic adjustments are made, adjusting the DAC reference current and the bias voltage of the IV converter circuit to give the AD1955 its own distinctive sound.
The AD1955 audio board can be purchased separately or with E7 DAP.
Owners of the E7 Exclusive Edition can purchase the new AD1955 at a special price of 799 CHF. Please contact us at:
- Email (info@audioessence.ch)
- Telephone (+41 77 403 35 26)
The future will be even more exciting!
Whether Select Edition or Standard Edition, there are only a limited number of AK4497 modules that ship 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 achieve -120dB distortion, single screening from the chip that covers 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!
