Cayin N7+ - a new digital audio player built on a fully discrete 1-bit DAC architecture. At its core is a balanced resistor scheme using 128 discrete components for signal conversion. This approach allows for the elimination of conventional chips and fine-tuning the converter at the level of individual elements, bringing the design closer to classic high-end stationary solutions.
The N7+ is tuned to deliver exceptional sound quality.
The Cayin engineering team conducted extensive joint listening sessions and tuning of the N7+, going through several meticulous listening stages. Extensive compatibility tests were conducted with major headphones on the market, carefully documenting their characteristics. The sound characteristics of the N7+ and their variations in different combinations. Thanks to continuous refinements, engineers have achieved a breakthrough in sound characteristics, significantly enhancing both listening pleasure and compatibility with a wide range of headphones.
Fully balanced system construction for maximum quality.
The most important feature is the fully balanced circuit scheme. This complex approach requires significant costs but opens unimaginable possibilities for fine-tuning sound. While the classic stereo scheme provides the left (L) and right (R) channels, a balanced scheme requires differential inputs and outputs. In this case, L+, L-, R+, R are required. Cayin is using this discrete scheme for the DAC, low-pass filter, and headphone amplifier in the N7 model for the first time.
For the discrete low-pass filter, Cayin developers settled on a balanced class A push-pull amplifier scheme based on dual bipolar transistors after numerous tests. The headphone amplifier itself is based on a 4-channel scheme with low-noise JFET (Junction Gate Field Effect Transistor) as the differential input stage and BJT (Bipolar Junction Transistor) as the amplifying and output stage. This reduces noise levels to a minimum and achieves a new level of audio signal processing and reproduction.
Further improving the design, four power transistors have been upgraded to PHPT610030NPK models, enhancing transient current control. Additionally, seven OPA1612A operational amplifier chips now use an SOIC-8 package, providing significantly better thermal stability. Improved contact layout and electrical characteristics reduce delays and cross-talk, ensuring clearer signal transmission and sound reproduction.
Decoding
The digital-to-analog converter can decode up to DSD512. PCM streams up to 32 bits and 778 kHz are accepted and converted internally into a DSD signal before the N7+ passes the signal to the DAC scheme. The 1-bit DSD DAC is specifically adapted to this DAP: the converted analog signal passes through a network of 128 high-precision thin film resistors. The output signal is balanced over four channels for the best interference-free reproduction. The power supply has also been redesigned specifically for the N7+. Thus, various sound circuit sections are independently powered according to their voltage requirements. Another feature that enhances sound quality is the aluminum frame of the N7+. It serves as an antenna, providing stable streaming anytime through dual-band WiFi 2.4 GHz or 5 GHz.
Amplifier now even more powerful
The amplifier, also based on discrete transistors, supports Class A and AB modes and can deliver up to 330 mW through the 3.5 mm and 690 mW through the balanced 4.4 mm output, making the player versatile for both sensitive in-ear models and tough full-size headphones. Separate power for digital and analog circuits reduces noise levels, and the optimized power system allows for up to 13 hours of operation without recharging.
The construction of discrete components provides amplification by a closed loop, negative feedback, and filter topology. After numerous attempts, we developed a symmetrical two-stage Class A amplification scheme based on two NPN+PNP bipolar transistors, providing high performance with a smaller board size and lower power consumption/heat dissipation.
Class A | Class AB operation mode. Operating with two amplifiers allows users to instantly switch between Class A and Class AB modes via a drop-down menu. Tailor the sound signature according to personal preferences, musical genres, and/or pairing with different IEM/headphones.
Fast and uninterrupted system operation
This device, equipped with an octa-core 64-bit Qualcomm Snapdragon 665 processor, combines 4GB of RAM and 64GB of internal memory, with support for expansion up to 1TB via a TF card. Running on Android 12 with support for lossless DTA data output, it ensures high-quality sound on all Android devices.
Dual-band Wi-Fi 2.4 GHz / 5 GHz is supported thanks to a specially designed antenna in the metal body, ensuring a high signal level and reduced interference for fast and stable streaming. It also supports OTA firmware updates and app installation, providing a customizable interface and future readiness. Bluetooth 5.0 with LDAC, UAT, AAC, and SBC codecs is supported, as well as full MQA (16x) decoding.
Joint dual line output and preamplifier
The Cayin N7+ features a balanced 4.4 mm and 3.5 mm line outputs. The unbalanced output can be configured as a line output or as a preamplifier output. This allows connecting the N7+ to a wide range of portable, desktop, and home audio devices. Special linear drivers allow independent control of the linear output and preamplifier signals, optimizing both outputs for their respective applications.
Long-lasting battery
The N7+ model has an optimized internal power system design. In PoE mode (Class AB), the 3.5-inch battery provides continuous music playback for 13 hours throughout the day, ensuring you never have to worry about running out of charge. The device supports fast PD2.0 charging.
Professional accuracy
The electronically-resistive analog volume control regulator from JRC, widely used in audiophile preamplifiers, provides low noise and distortion levels. The 4-channel built-in controller provides higher precision and lower power consumption than two stereo volume regulators. The special brass volume control knob with engraved flame patterns for improved grip provides precise control and an elegant look.
Electrical power - musical power
Electric power is the foundation of high-quality sound reproduction. A clean and stable power source is crucial for superior sound quality. A reliable power source to maintain optimal device operation is no less important, if not more so, than using costly components.
Cayin pays serious attention to developing power delegation systems even for very compact products, such as DAP. Despite the 1-bit DAC reducing the requirements for resistor accuracy, it requires carefully thought-out preprocessing to shape noise and a reliable power system, preferably without interference.
The power system in combination with the 1-bit scheme provides fully independent digital and analog power supplies. In the digital scheme, high-level and low-level logic schemes are also completely independent, ensuring no interference from clock signals during transmission and amplification, resulting in a cleaner audio signal.
Updated chassis
With a full redesign of the design and craftsmanship, the N7+ model has received an entirely new titanium-look exterior. The body is made of an aluminum-magnesium alloy with a titanium coating, processed on CNC machines, combining strength with relatively low weight.
This design highlights Cayin's engineering approach to creating portable sources, where quality circuitry and functional flexibility take top priority. The special gold-plated brass volume control knob with an engraved flame emblem. The elegant design provides enhanced grip and precise control.
Package includes:
- Player
- Case
- 4.4 - 2.5 mm adapter
- 3.5 - 2.5 mm adapter
- USB cable
- Manual.
