1. Introducció
The Nobsound Player 2 is a high-fidelity (HIFI) digital-to-analog converter (DAC) and headphone amplifier designed to enhance your audio experience. Featuring the advanced CS43131 decoding chip, it supports high-resolution audio formats including DSD256 and PCM up to 768KHz/32BIT, delivering lossless sound quality with exceptional clarity and detail. Its compact and portable design, coupled with multiple digital filter tuning options and powerful amplification, makes it a versatile companion for various audio devices.
2. Informació de seguretat
- No exposeu el dispositiu a l'aigua ni a una humitat excessiva.
- Eviteu temperatures extremes o la llum solar directa.
- No intenteu desmuntar ni modificar el dispositiu, ja que això anul·larà la garantia i pot causar danys.
- Mantenir fora de l'abast dels nens.
- Feu servir només amb dispositius i cables compatibles.
3. Contingut del paquet
Upon opening your Nobsound Player 2 package, you should find the following items:
- Nobsound Player 2 HIFI Decoder Headphone Ampunitat de lificació
- USB connection cable (Type-C or Lighting, depending on your selected version)
- Manual d'usuari (aquest document)

Figure 1: Nobsound Player 2 and its packaging.
4. Producte acabatview
4.1 Components
- Unitat principal: Compact metal body housing the DAC and ampcircuits de compensació.
- 3.5mm Output Interface: Per connectar auriculars.
- Botó multifunció: Controls gain, digital filter modes, and UAC mode.
- Connector USB: Available in Type-C or Lighting versions for connecting to source devices.

Figure 2: Nobsound Player 2 with both Type-C and Lightning connector options.
4.2 Característiques clau
- High-Performance DAC: Integrates the Lingyun Logic CS43131 decoding chip with two low-jitter clock crystals, achieving 125dB signal-to-noise ratio and 0.0002% distortion.
- Potent Amplificació: Delivers 135mW output at 32Ω, supported by Japanese RICOH ultra-low noise LDO independent power chips for robust thrust.
- Advanced Digital Processing: Features high gate count FPGA chips for ultra-low jitter digital signals, ensuring high-quality data for the DAC.
- Construcció Premium: Built with a CNC 5-axis Seiko aviation aluminum alloy shell for durability and a compact, portable form factor (45x13.5x10.5mm).
- High-Quality Cabling: Utilizes ultra-thick 8 silver-plated woven wires (5mm thickness) for high-quality audio signal transmission.
- Modes versàtils: Offers three gain adjustments, five digital filter modes, and UAC 1.0/2.0 mode switching.

Figure 3: High-performance CS43131 DAC chip.

Figure 4: Japanese RICOH ultra-low noise LDO power chip for powerful thrust.

Figure 5: High gate count FPGA chips for ultra-low jitter digital signals.

Figure 6: Compact dimensions of the Player 2 unit.
5. Configuració
5.1 Connexió a un dispositiu font
- Identify the correct USB connector type (Type-C or Lighting) on your Player 2 unit.
- Connect the Player 2's USB connector to your source device (e.g., smartphone, tablet, computer, Nintendo Switch).
- Connect your headphones to the 3.5mm output interface on the Player 2.
- The device is plug-and-play, offering responsive, lossless sound quality with stable transmission and no murmur.

Figure 7: Player 2 available with Type-C or Lighting sockets.
5.2 Supported Systems
The Nobsound Player 2 is compatible with a wide range of operating systems, including:
- Windows 7
- Windows 10
- Android
- iOS
6. Instruccions de funcionament
6.1 Botó multifunció
The Player 2 features a multi-function button on its body for various adjustments:
- Ajust de guany: Cycle through high, medium, and low gain levels.
- Digital Filter Mode Selection: Choose from 5 distinct digital filter modes.
- UAC 1.0/2.0 Mode Switching: Toggle between USB Audio Class modes for compatibility.
- Power Mode Switching: Switch between Low-power, Standard, and High-power Full On modes.

Figure 8: Location of the multi-function button on the Player 2.
6.2 Power Mode Switching
To switch between power modes, press and hold the multi-function button for 3 seconds.
- Mode de baixa potència: Designed for very low power consumption, ideal for extending battery life on mobile devices and gaming.
- Standard mode (Boot Default): Offers a balanced sound profile, suitable for low-resistance and high-sensitivity headphones, providing clean and transparent audio.
- High-power Full On Mode: Boosts strength and energy for a more powerful and immersive listening experience.

Figure 9: Explanation of power modes and switching.
6.3 Digital Filter Tuning Options
The Player 2 offers five digital filter modes. To cycle through these modes, short press the multi-function button. The LED indicator will flash to confirm the mode change.
| Acció | Mode | Descripció |
|---|---|---|
| Arrencada per defecte | Mode 1 | High frequencies are prominent and bright, vocals have a sense of line, low frequencies are compact, and dynamics are very strong. |
| Short press, light flashes once | Mode 2 | High frequencies are further raised, vocal rhythm is very strong, and low frequencies are slightly weaker. |
| Short press, light flashes once | Mode 3 | Vocals are a little closer and moister, low-frequency elasticity is deepened, high frequencies are slightly darker. Overall sound should be softer. |
| Short press, light flashes once | Mode 4 | Low frequencies are further deepened, vocals no longer highlight the sense of line, and the sense of atmosphere is more intense. Overall sound is soft and warm, with a bias towards low midrange. |
| Short press, light flashes twice | Mode 5 | Classic NOS mode, non-sampling filtering, original audio restoration. |
Note: Filter tuning is a fine-tuning of the hardware foundation and does not drastically change the sound style.

Figure 10: Digital filter tuning options.
6.4 Nintendo Switch Compatibility
To use the Player 2 with a Nintendo Switch:
- Press and hold the multi-function button on the Player 2.
- While holding the button, plug the Player 2 into your Nintendo Switch.
- When the red light on the Player 2 flashes, it indicates UAC 1.0 mode, which is compatible with the Switch.

Figure 11: Using Player 2 with Nintendo Switch.
7. Manteniment
- Netegeu el dispositiu regularment amb un drap suau i sec.
- Eviteu utilitzar productes químics o materials abrasius.
- Ensure connectors are free of dust and debris.
- Guardeu el dispositiu en un lloc fresc i sec quan no l'utilitzeu.
8. Solució De Problemes
- El producte no funciona: Ensure the product is properly connected and used according to the instructions in this manual. Verify that your source device is outputting audio correctly.
- Sense sortida de so: Check headphone connections, volume levels on both the Player 2 and your source device. Ensure the correct UAC mode is selected if applicable (e.g., UAC 1.0 for Nintendo Switch).
- Distorsió del so: Try adjusting the gain levels or switching digital filter modes. Ensure your headphones' impedance is within the recommended range.
9. Especificacions
| Característica | Especificació |
|---|---|
| Model DAC | CS43131 |
| Material del cos | Metal (Aviation Aluminum Alloy) |
| Profunditat de bits | 16/24/32 bits |
| DSD Support | 64/128/256 (Dop: DSD64/128 via USB; Native: DSD64/128/256 via USB) |
| Suport PCM | 44.1/48/88.2/96/176.4/192/352.8/384/705.6/768KHz |
| Sistemes suportats | Win7, Win10, Android, iOS |
| Interfície de sortida | 3.5mm single-ended |
| Tipus d'entrada | USB (Type-C or Lighting) |
| Voltage (VBUS) | 4.5-5.3V |
| Botons multifunció | Sí |
| Single-ended Output Power | 135mW@32 Ω |
| Resposta de freqüència | 20-50KHz |
| Relació senyal/soroll (SNR) | 125dB (RL=600Ω, weighting=A) |
| Distorsió | 0.0002% (RL=600Ω, 0dB) |
| Mida del producte (L*W*H) | 45 * 13.5 * 10.5 mm (sense incloure la longitud del cable) |
| Recommended Headphone Max Impedance | 501 - 600 Ohms |
| Bateria incorporada | No |
| Certificació | CE, FCC, KC |
10. Consells d'usuari
- For optimal sound, experiment with the different digital filter modes to find the one that best suits your headphones and music genre.
- If using with a Nintendo Switch, ensure the device is in UAC 1.0 mode by pressing and holding the button while plugging it in.
- Utilize the gain adjustments to match the sensitivity of your headphones and achieve desired volume levels without distortion.
- The Player 2 is designed for plug-and-play convenience, but ensure your device's audio settings are configured to output through the USB DAC if needed.
11. Garantia i Suport
This product comes with a 1-year warranty from the date of purchase. The warranty covers manufacturing defects but excludes damage caused by human factors or improper use.
For technical support, warranty claims, or any other inquiries, please contact the seller's customer service. Ensure you have your purchase details readily available when contacting support.





