Luxury & Precision E7 Standard Version Digital Audio Player (DAP) W/ Case

Luxury & Precision E7 Standard Version Digital Audio Player (DAP) W/ Case

Product code:
E7 - Standard
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Available March
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Luxury & Precision E7 Standard Version Digital Audio Player (DAP) W/ Case

Features

  • AK4497: Voltage-type DAC, no need for I/V conversion
  • Suitable for portable DAPs
  • Optimized design unlocks full potential
  • Outperforms AK4499 based DAPs in all aspects

Specifications

Color/Size/Weight blackish green/71x133x20mm/300g
Display 5 inches, (1080*1920)
DAC AK44972
Clock source Ultralow phase Noise -160db, OSC *2
Buttons ALPS
TF card theoretically support up to 1TB
batt type Li-polymer battery
Battery capacity 4700mA/H
Power supply POWER IN DC 5V 2A
Battery life and test conditions 3.5mm Po output: 8h; 4.4mm Po output: 5h Screen Off, WAV 48kHz/24bit, vol:70, Load:320
Recommended headphone impedance 8-300ohm
Equalizer 10-band EQ (±12dB), 6 presets+3custom preset
Gain control Low/high
DOP SPDIF supported
Digital Filter six types of digital filters
Phase Inversion supported
USB Connection mode MSC/Audio/Charge
USB DAC supported
Sampling Rate Supported:APE/AAC/ALAC/FLAC/WAV/MP3/WMA/DFF/DSF/AIFF/SACD-ISO
File format support PCM: 24bit 384KHz DSD: 11.2896MHz(DSD256)
packages list E7 host x1、AK4497 exclusive card x1、TYPE A-C 3.2cable x1、TYPEC-A 3.2adapter x1、 Manual x1、warranty x1、Fabric cloth sackx1
Audio ports 3.5mm SE (LO、PO、SPDIF), 4.4mm balanced (LO、PO)
LO output parameters(3.5mm SE)
SNR >127db (A Weighting),  125db (A Weighting)
Dynamic Range >127db (A Weighting),  >125db (A Weighting)
THD+N < 0.00022% @24bit 96KHz Awt,  < 0.00025% @24bit 96KHz Awt
Frequency Response 20Hz-20KHz +/- 0.2db
Crosstalk >98db
output voltage(rms) High Gain 2.05/2.75Vrms Low Gain 0.55/0.7Vrms, High Gain 2.05Vrms Low Gain 0.55Vrms
LO output parameters(4.4mm balanced)
SNR >130db (A Weighting),  >127db (A Weighting)
Dynamic Range >130db (A Weighting), >127db (A Weighting)
THD+N <0.0001% @24bit 96KHz Awt,  <0.00014% @24bit 96KHz Awt
Frequency Response 20Hz-20KHz +/- 0.2db
Crosstalk :> 115db
output voltage High Gain 4.1/5.5 Vrms, Low Gain 1.1/1.5 Vrms, High Gain 4.1Vrms, Low Gain 1.1Vrms
PO output parameters(3.5mm SE)
Output power@160 425mW, 262mW
Output power@320 230mW, 131mW
Output power@1000 75mW, 40mW
SNR >127db (A Weighting),  >125db (A Weighting)
Dynamic Range >127db (A Weighting), >125db (A Weighting)
THD+N <0.00025% @24bit 96KHz Awt, < 0.00028% @24bit 96KHz Awt
Frequency Response 20Hz-20KHz +/- 0.2db
Crosstalk >75db
output voltage High Gain 2.05/2.75Vrms, Low Gain 0.55/0.7Vrms, High Gain 2.05Vrms, Low Gain 0.55Vrms
Output impedance 1.20

Bluetooth

Bluetooth receiver:5.0
Codec Type:LDAC/APTX/APTXHD/APTXLL/AAC/SBC
Direction Bluetooth Receiver
Transmission distance 15 metre

Description

Transcending × Subversion X Limitless

LP’s new 7 series modular flagship DAP E7 debuts!

One machine infinite possibilities

Discontinued chips, no wastage dual AK4497, unleashes the full potential of the flagship DAC; Large surface area, endless possibilities the industry’s largest interchangeable module for analog PCBA area; Non-Android, very pure – a brand new LP OS with a more powerful MCU.



The new DAP is made possible by utilizing the last batch of AK4497 DACs in the world

AK4497 is a voltage-type DAC, not the current-type DAC AK4499, and therefore does not require additional I/V conversion. It is more suitable for portable DAPs. When designed properly, we can fully optimize its potential. In terms of actual performance: a portable DAP using AK4497 exceeds AK4499 based DAP in all aspects



How powerful is the DAP that fully exploits the AK4497?

Nearly 10 db higher than the current high level machines in the industry, and is 4 db higher than the nominal performance of the AK4497 DAC chip.



Simplified schematic diagram of power supply architecture for E7 AK4497 analog section



E7 AK4497 Two-Year Development Seven Major Version Circuit Evolution Simple Explanation

Over the past two years, E7’s AK4497 card circuit board has undergone dozens of fine tuning, including seven major revisions:

First revision: The THD+N limit performance of this version reached -120db, with a
dynamic range of 131db, but the sound performance did not meet our expectations
and the consistency was not stable;

Second revision: Added more DAC VREF capacitors and increased their capacity and voltage reference stability on the basis of the first edition;

Third revision: Tried different layouts and wiring to improve performance and sound, but the results were not ideal and were eventually abandoned,

Fourth revision: Adjusted the grounding of the op-amp circuit on the basis of the second edition and added an independent power supply for AK4497 AVDD5V to enhance the layering and separation of the sound;

Fifth revision: Added a pair of independent positive and negative power supplies to each op-amp on the basis of the fourth edition, which significantly improved the tension and sound field of the sound;

Sixth revision: Further optimized the layout and wiring based on the fifth edition and improved the filtering of AK4497 AVDD3.3V, Improving the performance at 12K and eliminating some noise;

Seventh revision: The final mass production version, which ultimately adopted 13 independent power supplies. On the basis of the sixth edition, copper plating was added to increase heat dissipation, reduce the impedance of the analog circuit ground, and make the sound performance more calm and atmospheric, exceeding our expected sound performance.



New “intoxicating” Earphone Amplifier Architecture

Double Earphone Amplifier Chip; Reduce Output Voltage; Sweet, Atmospheric, Relaxed.

Only for E7 AK4497 EXCLUSIVE EDITION

Software and hardware are optimized for your listening pleasure In-house developed subversive harmonic tuning; Fine operational amplifier voltage regulation; New “intoxicating” ear amplifier architecture.



How is the new “LeOS” operating system different from Android?

Focus on audio, lower power consumption, less interference, easier to use! Leave more power to the decoding amplifier circuit.

Additional information

Colour

Black

Warranty

Backed in 1 Year Manufacturer Warranty

Delivery Info

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Delivery Information

As a company our primary goal is to provide a seamless service that results in customer satisfaction. We aim to deliver within 3 working days. Unfortunately, there may be occasions where this time frame may not be met due to unforeseen circumstances; in this instance, we deliver product/s as soon as we can. All delivery charges are included within the prices quoted, unless otherwise specified.

All small items are usually delivered between 9am and 6pm, on a Monday to Friday, unless a Saturday delivery is requested. Follow My Parcel is an industry-changing innovation from DPD Local, which will give your customers unparalleled levels of information and peace of mind.Not only will your customers receive a one hour delivery timeslot, but they’ll now also be able to track the progress of their parcels on a map as our drivers make their way to the delivery addresses. Follow My Parcel will:

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