DescriptionWhy make Tuner ? The human ear has a lot of perceptual factors in understanding the sound, and is susceptible to external interference and even its own state. Even if the same person is on the same machine, the feelings heard during different periods and mentality may be very different. XUELIN Tuner creatively platform the entire system, and each module can be independently combined to allow users to gain greater autonomy. And become a platform for enthusiasts to learn, improve, and exercise listening.DAC AK4497 is a high quality 32-bit dual channel DAC based on AKM's VELVET SOUND technology. The device offers low distortion with -116dB THD+N DAC and 128dB S/NLPF 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 energyAmplifier 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'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.SpecificationCPU: 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 CapacitorConnector: 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 interfaceStandard moduleOptional modules will be launched 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)Support Format： APE：Fast Normal High，8KHZ-192KHZ，16bit-24bit，Support CUE WAV : 8KHZ-192KHZ，16bit-24bit-32bit，Support CUE WMA /Wma Lossless: 8KHZ-96KHZ, 16bit-24bit FLAC : 8KHZ-192KHZ，16bit-24bit，Support CUE DSD/ DFF/ ISO DSD: 2.8KHZ,1bit Aiff: 8KHZ-192KHZ, 16bit-24bit-32bit M4A:8KHZ-192KHZ, 16bit-24bit MP2/MP3/ OGG: 8KHZ-48KHZ, 16bit AAC: 8KHZ-48KHZ, 16bit-24bit Earphone output power:400mw/16ohm 200mw/32ohm 48mw/300ohm Coaxial output impedance:75ohm Coaxial output level：500mv p-p Line output basic level:2v±1.8dB(1KHz) Noise ratio..≥110dB.A Weighting Channel imbalanced≤1.0dB(1KHz) Separation≥94dB(1KHz) Frequency response:20Hz~20KHz(+0/-2.5dB) Distortion and noise…..≤0.015%(1KHz)Work power: AK4497+OPA1642+SHORT+CLASS….455MA AK4497+OPA1642+SHORT+AD8397….310MA AK4497+OPA1642+SHORT+TPA6120….300MA Storage:TF card（Maximum 128GB） Battery: 3000mah 4.2vlithium battery Size: 130*69*28mm Weight: 260gPackage H8 Player Usb Cable ,One Minute And Three Connections(LINE+Coaxial) Standard Module ( 8pcs, It Can Be Customized) Screwdriver*1 Spare Screw*10 Suction Screen User Manual Pouch
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