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[Story of N7's Development] https://starspickeraudio.net/blogs/blog/stories-about-cayin-n7-development

Cayin N7 - Pure 1-bit Android-based Digital Audio Player

[Features]
- Fully Balanced Digital and Analog Circuit
- Discrete Dual BJT Low Pass Filter
- 1-Bit Resistor Network DSD Decoding
- Discrete JFET + BJT Headphone Amplifier
- 16x MQA Full Decoder
- Dual Amp. Mode (Class A/AB)
- Phone Output (3.5mm S-E/4.4mm BAL)
- Line and Pre Out (3.5mm S-E/4.4mm BAL)
- 3x Digital Interface (I²S/USB/Coaxial)
- Dual Femtosecond Oscillators
- 4-CH JRC Electronic Volume
- Wireless DAC Bluetooth 5.0 (LDAC/UAT/AAC)
- HiByCast/HiByLink support
- Dual Band WiFi 2.4G/5G
- Qualcomm Snapdragon 665 SOC
- 4GB System RAM, 64GB Internal Storage, expandable MicroSD Card slot
- cm. Android 12 DTA (SRC bypass) Hi-Res Streaming
- 9000mAh Battery (6.5~10 hours battery life), USB PD2.0 support
- 5-inch 1080p Display
- Sandblasted CNC Aluminium Finish

Unexplored Frontier in DAP - Fully-discrete Fully-balanced Design

Going Discrete is technically more demanding but it allows more room to fine tune sound signature and deliver superior performance over op-amp based design
Regular stereo circuit composes of Left (L) and Right (R) channel, balanced circuit involves differential inputs and differential outputs, hence required L+, L-, R+, R-.
Cayin's first attempt to use discrete circuit for DAC, LPF and Headphone Amplifier in a DAP. Adopts a symmetrical double-sided PCB layout for N7, minimize interference and keep the layout and length of signal path as uniform as possible.

SPEC SHEET
Please refer to the final listing picture.

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