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Cayin C9 + N7 = Endgame Audiophile Sound | Moon Audio

N7 DAP Music Player - Open Box

Was: $1,999.00
Now: $1,799.00
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The Cayin N7 The N7 DAP features a fully discrete 1-bit DAC, fully-balanced design, LPF, and he… More details

Cayin C9 + N7 = Endgame Audiophile Sound | Moon Audio

Open-Box items are Final Sale

CAYIN N7

Introducing Cayin’s latest music player, the N7. The N7 DAP features a fully discrete 1-bit DAC, fully-balanced design, LPF, and headphone amplifier. The N7 is the latest in high-resolution portable sound from one of the leading audio manufacturers of premium digital music players. The Cayin flagship N8ii remains ones of the most popular DAPs on the market today, but the N7 takes a completely different approach to hi-res sound. The N7 developed the first miniature pure 1-bit DAC circuit with four rails of resistor network, resulting in astounding accuracy and likely one of the closest experiences of analog in a portable (DAP) application.


The discrete 1-bit DAC can native decode up to DSD512 and accept PCM up to 32 Bit/768kHz. Cayin also developed a discrete LPF (low pass filters) circuit to tune the output stage of their 1-bit DAC to closely resemble a smooth and natural sound signature. The headphone amplification of the N7 is nothing short of spectacular; it is fully-discrete, fully-balanced design with Cayin’s renowned Dual Amplifier Operation (DAO, choice of Class A or Class AB) feature. The N7 is Android 12 based with Google play preinstalled so it is streaming ready.

Features at a Glance

  • Discrete Dual BJT Low Pass Filter
  • 1-Bit resistor network DSD decoding
  • Discrete JFET + BJT headphone amplifier
  • 16x MQA full decoder
  • Dual amps: Class A/AB modes
  • 3.5mm single-ended and 4.4mm balanced headphone outputs
  • 3.5mm single-ended and 4.4mm balanced line and pre-outputs
  • 3x digital interface: I2S, USB, and Coaxial
  • Dual femtosecond oscillators
  • 4-ch JRC electronic volume
  • Wireless DAC, Bluetooth 5.0, LDAC, UAT, and AAC codecs
  • HiByCast and HiBy Link
  • Dual band WiFi 2.4G/5G
  • Snapdragon 665, 4GB RAM, TFx1, & 64GB internal storage
  • Android 12 DTA
  • 9000 mAh battery = 6.5-10 hr battery life, features PD2.0
  • 5’ TFT FHD touchscreen
  • Sandblasted CNC aluminum


N7 DAP music player by Cayin sitting on a stand next to an amplifier

Fully-discrete, fully-balanced design

Engineering a discrete design is much more demanding, but it allows more room to fine tune the sound signature, tonal control, and deliver superior performance over an op-amp based design. Regular stereo circuits are composed of a left (L) and right (R) channel whereas a balanced circuit involves differential inputs and outputs, and hence require a L+, L-, R+, and R-. This is Cayin’s first attempt to use a discrete circuit for the DAC, LPF, and the headphone amplifier in a DAP. The N7 adopts a symmetrical double-sided PCB layout which minimizes interference and maintains the layout and length of the signal path as uniform as possible.


Pure 1-Bit DSD DAC

The N7 uses discrete resistor networks for DSD format. The micro-miniaturized 1-bit DAC circuit uses fully-discrete components.

  • Discrete 1-bit DAC: converts digital signal to an analog signal through a resistor network composed of 128 pcs (4x32) high-precision thin film resistors.
  • FPGA: Enhances the digital audio signal and output L+, L-, R+, R- digital bitstream for fully-balanced decoding.
  • Audio Bridge: pass-through DSD unaltered, convert PCM to a 1-bit bitstream before transmitting to the DAC circuit.
  • Power Supply: the N7 uses a sophisticated low-noise highly-isolated supply circuit to support different functions of digital and analog processing separately.


Discrete LPF

The N7 uses a discrete-components design for closed-loop gain, negative feedback and circuit architecture of the LPF. After numerous attempts, Cayin developed a symmetric Class A push-pull amplification circuit based on dual NPN+PNP Bipolar Transistors, delivering high-performance in reduced board space and low power consumption/heat dissipation.


Discrete Headphone Amplifier

The N7 uses a 4-channel discrete components-based circuit with low-noise audio grade JFET (Junction gate Field-Effect Transistor) as the differential input stage and BJT (Bipolar Junction Transistor) as the voltage amplification and final output stage. The N7 delivers high-power low-noise output with special optimization for low impedance IEM and portable friendly headphones.

  • Synchronized Accurately: the sophisticated resistor network can decode satisfactorily when its algorithm can be synchronized perfectly against different sampling frequencies. The N7 employes two femtosecond crystal oscillators with extremely low phase noise (-100Bc) to facilitate high precision low jitter playback. Low jitter also minimizes digital artifacts and enhances the musicality and naturalness of the digital audio playback.
  • Dual Amplifier Operation Mode: The dual amplifier operation mode enables users to switch between Class A and Class AB modes instantly through the pull-down menu. You can customize the sound signature to for your personal preference, music genres, and/or matching with different IEMs or headphones.
  • Design Details: Class A amplification requires all channels to have near-identical gain, and Cayin has matched critical components accordingly, and manually installed them to the PCB before reflow soldering. The static current must also be well-controlled so that the discrete components will remain perfectly stable in operation during saturation mode. Multiple adjustable resistors are installed so that Cayin is able to fine tune the PCBA manually in order to match their reference design consistently throughout the production line.


N7 DAP music player by Cayin on a table next to a speaker, musical instrument, and tulip flower.
Cayin N7 DAP Music player, closeup on the corner, sitting on a wood table.

About Cayin

Cayin was founded in 1993. While our products carry a distinctive cultural connotation and span over a very wide price range, we are devoted to developing the best sounding audio equipment at competitive prices. We have developed over 400 products to date, ranging from CD players to speakers, all of which provide the same high-quality benchmark and attractive price to performance capabilities. Our tube amplifiers have been particularly well-received within the audio community because of this commitment. With a spectacular track record of over 70 local and international awards, Cayin has grown into one of the largest audio tube amplifier development and manufacturing facilities in the world. Cayin pays attention to detail because we believe this is what it takes to reproduce music naturally. We might have a different agenda or employ different technologies for different products, but ultimately, we serve only one purpose: to move our audience with hi-fidelity. We deliver music diligently, and we are prepared to go a long way for that. With Cayin, your music will never be the same again.


Specifications

MCU
Snapdragon 665
System
Customized Android 12
Display
5" (1080 x 1920) TFT multi-point touch screen
Google Play
Preinstalled
Lossless
DTA bypass Android SRC
Memory
4GB LPDDR4 RAM
Storage
64GB Internal Storage TF x1 (support up to 1TB)(
Wi-Fi
2.4G/5G IEEE 802.11a/b/g/n/ac
Bundled Player
Cayin Music; HiByMusic (HiByCast supported)
Bluetooth
BTv5.0 with LDAC, UAT, AAC, SBC
Multi-Color Smart LED
Playback Sampling Rate, Home, charging indicator
Battery
3.8V 9000mAh (34.2Wh)
Dimension
142 x 77.8 x 22.2 (mm)
Audio Bridge
DSD direct Pass through PCM transcode to DSD512
FPGA
Re-clock, De-jitter, Re-shaping DDC
DAC
Fully Balanced Discrete 1-Bit Resistor Network DSD DAC
LPF
Discrete BJT circuit
Vol. Control
4 Channels electronic
Head Amp.
Discrete, 4-Ch Fully Balanced
Phone Out
3.5mm (Single-Ended) 4.4mm (Balanced)
Line Out and Pre Out
3.5mm (Single-Ended) 4.4mm (Balancd)
Digital Interface
1S, USB Audio (in and out) SPDIF Coaxial (USB-embedded)
USB Type-C
USB3.1, OTG Storage, Digital Audio PD2.0 (QC2/3 not supported)
Physical Control
Volume knob, Power On/Off Playback control buttons
Chassis
Sandblasted CNC Aluminum
Net Weight
~380g
Headphone Output
  • Power Rating: 250mW @ 32Ω (Single-Ended), 500mW @ 32Ω (Balanced)
  • Freq. Response (±0.2dB, Fs=192kHz): 20Hz-20kHz
  • THD+N (1Vrms) (1kHz, Fs=44.1kHz, 20Hz - 20kHz, A-Weighted): 0.004% (Single-Ended), 0.004% (Balanced)
  • Dynamic range (1kHz, 20Hz-20kHz, A-Weighted): 110dB (Single-Ended), 112dB (Balanced)
  • SNR (20Hz-20kHz, A-Weighted): 115dB (Single-Ended), 116dB (Balanced)
  • Channel separation (1kHz, Fs=44.1kHz): 78dB (Single-Ended), 110dB (Balanced)
  • Output impedance: 0.6Ω (Single-Ended), 1.2Ω (Balanced)
Pre Amp. Out
  • Output Level (RL=10kΩ, High gain): 4.0Vrms (max) (Single-Ended), 7.0 Vrms (max) (Balanced)
  • Freq. Response (±0.2dB, Fs=192kHz): 20Hz-20kHz, 20Hz-20kHz
  • THD+N (1kHz, Fs=44.1kHz, 20Hz-20kHz, A-Weighted): 0.005% (Single-Ended), 0.004% (Balanced)
  • Dynamic range (1kHz, 20Hz-20kHz, A-Weighted): 112dB(Single-Ended), 114dB (Balanced)
  • SNR (20Hz-20kHz, A-Weighted): 116dB (Single-Ended), 114dB (Balanced)
  • Channel separation (1kHz, Fs=44.1kHz): 98dB (Single-Ended), 105dB (Balanced)
  • Output impedance: 110Ω (Single-Ended), 220Ω (Balanced)
Line Out
  • Output Level (RL=10kΩ): 2.0Vrms (max) (Single-Ended), 4.0 Vrms (max) (Balanced)
  • Freq. Response (±0.2dB, Fs=192kHz): 20Hz-20kHz, 20Hz-20kHz
  • THD+N (1kHz, Fs=44.1kHz, 20Hz-20kHz, A-Weighted): 0.005% (Single-Ended), 0.004% (Balanced)
  • Dynamic range (1kHz, 20Hz-20kHz, A-Weighted): 112dB(Single-Ended), 114dB (Balanced)
  • SNR (20Hz-20kHz, A-Weighted): 116dB (Single-Ended), 117dB (Balanced)
  • Channel separation (1kHz, Fs=44.1kHz): 98dB (Single-Ended), 105dB (Balanced)
  • Output impedance: 100Ω (Single-Ended), 200Ω (Balanced)
Digital Interface
  • I²S: Connector Mini HDMI (HDMI Type-C) (Transmits I²S signal via HDMI connector, not compatible with standard HDMI devices) PCM up to 32Bit/768kHz; DSD up to DSD512
  • S/PDIF Coaxial: Connector: USB-C, PCM up to 32Bit/768kHz, DSD up to DoP64
  • USB Audio Out: Connector USB-C, PCM up to 32Bit/768Hz; DSD up to DSD512
  • USB Audio DAC: Connector USB-C, Asynchronous USB Audio Class 2.0, Systems: Windows (drivers required), MacOS, Android (partial), iOS PCM up to 32Bit/768Hz; DSD up to DSD512 (Native) or DoP256
  • Bluetooth: v5.0, Transmit Codec: UAT (up to 192kHz), LDAC (up to 96kHz), AAC (up to 48kHz) and SBC (up to 48kHz), Receive Codec: UAT (up to 192kHz), LDAC (up to 96kHz), AAC (up to 48kHz) and SBC (up to 48kHz)
Battery and Duration
  • Condition: Screen off, all wireless disabled, 32mid gain, Class AB, volume 30, playback 44.1kHz WAV music files
  • 3.5mm (Single-Ended) Class A ~8.5 Hr
  • 3.5mm (Single-Ended) Class AB ~10 Hr
  • 4.4mm (Balanced) Class A ~6.5 Hr
  • 4.4mm (Balanced) Class AB ~8.5 Hr
Charging
  • Standard Charger (5Standard Charger-2A) ~5.5 Hr
  • Quick Charge PC2.0 (9V/2A) 0-100% ~3.5 Hr, 20-80% ~2 Hr
N7 Music Format
  • DSD DSF; 1bit, 2.8MHz - 22.6MHz, Native and DoP D2P (convert to PCM 88.2kHz), Supports DST encoded DFF and SACD-ISO
  • DSD DFF: 1 bit, 2.8MHz - 22.6MHz, Native and DoP D2P (convert to PCM 88.2kHz), Supports DST encoded DFF and SACD-ISO
  • DSD SACD-ISO: 1 bit, 2.8MHz, Native and DoP D2P (convert to PCM 88.2kHz), Supports DST encoded DFF and SACD-ISO
  • MQA: 16bit-24 bit, 44.1kHz - 768kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • PCM WAV: 16bit - 32bit, 32kHz - 768kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • PCM AIF/AIFF: 16bit - 32bit, 32kHz - 768kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • PCM FLAC: 16bit - 24bit, 32kHz - 192kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • PCM M4A (ALAC): 16bit - 24bit, 32kHz - 192kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • PCM APE (Fast): 16bit - 24bit, 32kHz - 768kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • PCM APE (Normal): 16bit - 24bit, 32kHz - 768kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • PCM APE (High): 16bit - 24bit, 32kHz - 768kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • PCM APE (Extra High): 16bit - 24bit, 32kHz - 192kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • PCM APE (Insane): 16bit - 24bit, 32kHz - 192kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • WMA Lossless: 16bit - 24bit, 32kHz - 96kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • WMA: 16bit - 24bit, 32kHz - 96kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • MP3: 8bit - 16bit, 32kHz - 48kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • AAC: 8bit - 16bit, 32kHz - 48kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • OGG: 8bit - 16bit, 32kHz - 48kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported
  • OPUS: 16bit, 32kHz - 48kHz, Supports DTS encoded WAV, Supports CUE and LRC, 64kHz Sampling not supported

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