Guaranteed In Stock
Available March
1-year-warranty
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Available to collect immediately£2,799
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.
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
LP’s new 7 series modular flagship DAP E7 debuts!
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.
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.
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.
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.
Double Earphone Amplifier Chip; Reduce Output Voltage; Sweet, Atmospheric, Relaxed.
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.
Focus on audio, lower power consumption, less interference, easier to use! Leave more power to the decoding amplifier circuit.
Tuning Style: Harmonic tuning is richer and sweeter, suitable for pop; high dynamic mode is more grand and brilliant, suitable for classical; low distortion mode is more original, suitable for monitoring.
| Colour | Black |
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