The YinLvMei M400E is an innovative portable headphone amplifier featuring a built-in DAC, tailored for discerning users who seek a blend of functionality, contemporary aesthetics, and adaptability. This device incorporates the top-tier ESS ES9038PRO DAC, which boasts an 8-channel architecture. Each channel is paired with an OPA1612 operational amplifier, complemented by an additional set of the same components for enhanced filtering. This design ensures exceptional signal processing precision and an extensive dynamic range.
The device supports decoding at resolutions up to 32 bits / 768 kHz and DSD512, ensuring compatibility with high-resolution audio files. A modern asynchronous interface on the CT7601PR chip is used for the USB signal, which has a positive effect on the stability and quality of transmission.
The volume control system is based on two PGA2311 chips from Texas Instruments. This is a programmable analog regulator with high accuracy and low noise, which helps to avoid distortion and quality degradation typical of digital solutions.
A custom bundle is used in the amplification path: two operational amplifiers and eight power transistors operating in class A. The amplifier is able to adapt to headphones of different impedance and sensitivity, including due to two-stage gain control. A Japanese-made NEC relay is provided to protect against clicks when connecting.
The M400E is also equipped with a Qualcomm CSR8675 Bluetooth module with support for all popular codecs, including LDAC, aptX HD, aptX LL, AAC and SBC. This allows you to use it not only as a stationary or portable device with a wired connection, but also as a wireless DAC with wide capabilities.
The device body is made of aluminum processed on CNC machines and protected by 2.5D glass. Inside is a 5000 mAh battery, providing up to 6 hours of battery life. On board there is also a 4.4 mm balanced output, a display, 7 digital processing filters and support for voice calls.
The YinLvMei M400E model is suitable for those looking for a universal DAC / amplifier with serious circuitry, ease of connection and the ability to work both at home and in a mobile environment.
YinLvMei M400E Specifications :
- DAC: ESS9038PRO
- USB chip: CT7601PR
- Bluetooth chip: CSR8675
- Bluetooth support: LDAC / aptX-HD / aptX-LL / aptX / AAC / SBC
- Operational amplifier IV: OPA1612×4
- Low Pass Filter: OPA1612×2
- Amplifier: Two custom op amps + 8 output transistors
- Volume control: Pga2311ua×2 + dual power supply from TI + TTC encoder
- Processor: 16-bit STM8S
- Input: USB Type-C
- Outputs: 4.4 balanced / 3.5 line / 3.5 headphone / 3.5 coaxial
- Gain: Two modes with cyclic switching
Price: $539.99 USD
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