DAC
AK4497 is a high quality 32-bit dual channel DAC based on AKM&x27;s VELVET SOUND technology. The device offers low distortion with -116dB THD+N DAC and 128dB S/N
LPF op amp module
OPA1642 is a JFET input, low distortion, low noise op amp. Its high frequency is vivid, just like the triangular iron in the thunderstorm, crisp, clean and sweet.
MUSE8920 is a professional audio op amp with clear, clear sound and comfortable listening.
Coupling module
When capacitive coupling, the longitudinal sound field shrinks, the high-pitched sound is buckled, the middle sound is round and gorgeous, and the human voice is more enchanting.
When the direct connection is coupled, the sense of hearing is straightforward and the sound field is large. And the low frequency dive deeper and have a sense of energy
Amplifier: TPA6120--TI professional amp chip with amazing high indicators, clean and smooth sound
AD8397 - the most classic and most widely used amp. The voice is enchanting, and it is full of music.
CLASS discrete amp
XUELIN Tuner&x27;s CLASSA full-discrete headphone amplifier module integrates 88 parts in a coin-only limited space (25*25mm). Zen thoughts, do the dojo in the snail shell. It uses an excellent Walman architecture and jfet triode input, static 40mA, full thrust and sweet grip, no matter the hardware test indicators or the actual sense of hearing have achieved a surprising effect. This module is based on xueliniHiFi-2018 Class A amp transplant and retuned to fit the portable work environment.
2.4inch 360*400 pixel IPS screen
The resolution is 100% higher than that of the normal VGA screen. The UI is based on the mature 990 system and has been verified by thousands of users.
Specification
CPU:
Storage: External TF card storage up to 128GB
Volume adjustment: PGA2311 volume
Display: 2.4inch retina liquid crystal (400*360dip)
Power Management: APX202/Power LDO: TPS7A33+TPS7A47
JZ4760 dual core 600MHZ master chip
Power Filter: Polymer + Super Solid Capacitor
Connector:
1.RCA coaxial digital output interface (IEC-60958) and LINE OUT interface
2.HEADPHONE 3.5mm output connector (with 6.5mm earphone adaptor)
3.HEADPHONE 2.5mm Balanced output connector (requires optional balance module to work)
4.USB data and charging interface
5.TF card expansion interface
DAC: AK4497*1
Audio coupling: Melaleuca cake film+MLCC
LPF:OPA1642*1
AMP:AD8397*1
LPF:Muse8920*1
AMP:TPA6120*1
Auio coupling: Direct connection
AMP: CLASS A*1
(The following is based on unbalanced mode AK4497+MUSES8920+ capacitive coupling+class+ZERO)