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Description
YinLvMei M400plus AK4499 DAC advanced Decoding headphone amplifier Bluetooth LDAC USB sound card 4.4 output DSD256 Full Balanced
M400 plus is a new upgraded series based on M400. From appearance to circuit architecture, it uses AKM’s new DAC chip-AK4499, and focuses on the power supply. It is equipped with 8 Panasonic 330UF E-type tantalum capacitors, 4 OPA1612 as IV conversion, full firepower, each 4499 has 4-channel output, each channel has an IV conversion, non-castration design (some products only use 2 IVs for each 4499), and finally merged. To achieve a very high level of sound quality, the volume control adopts Texas Instruments PGA2311UA, 2 pieces, combined into a 4-channel synchronous adjustment, no dynamic compression, no partial sound, long life, secondary screen display volume, gain, DAC filter Wait, the balanced output uses the 4.4 output port, retaining the grounding function.Compared with M400, M400plus is upgraded as follows:1. The shell technology is greatly improved, the glass is changed to 2.5D, and the texture is better.2. On the premise of retaining the original high-definition asynchronous USB input, a new Bluetooth input is added, using the CSR8675 main control, supporting LDAC, APTX-HD, APTX-LL, APTX, AAC, SBC and other protocols.3. Add AK4118 for digital processing4. The battery capacity is increased to 5000mah, and the battery life exceeds 7 hours.5. Bluetooth mode supports call function.6. Newly added wireless charging function, Qi standard, supports 7.5W wireless fast charging without interference.7. Improve the problem of USB input interface protruding too much and easy to loose.8. Optimize the IV circuit, LPF circuit, coupling capacitor, reduce the current sound, make the sound low and clean, improve the high frequency, human voice, low frequency, better transparency, and solid low frequency.
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