1. Introduzione
This manual provides detailed instructions for the setup, operation, and maintenance of your Nobsound NS-20G Mini Bluetooth 5.0 Power Amplifier. The NS-20G is a compact 2.0 channel stereo amplifier featuring Bluetooth 5.0 connectivity, a headphone output, and Digital Signal Processing (DSP) for enhanced audio quality. It is designed for home and desktop audio systems, delivering up to 200W (100W x 2) of output power.
2. Cosa c'è nella scatola
- Nobsound NS-20G AmpUnità lificatore
- Alimentazione elettrica
- Cavo audio RCA
- Cavo audio da 3.5 mm
- Manuale d'uso
3. Caratteristiche del prodotto
- Design compatto: Mini size suitable for home and desktop use.
- Elevata potenza in uscita: Delivers 200W (100W x 2) using two TPA3116 chips.
- Qualità del suono Hi-Fi: Provides clear audio with minimal noise.
- Bluetooth 5.0 + EDR + DSP: Ensures wireless lossless signal transmission for high-fidelity sound within a 15-meter range.
- Cuffia AmpFunzione lifier: Supports headphones with impedance between 15-32Ω.
- Ingressi multipli: Bluetooth and 3.5mm AUX input for wide compatibility with various devices.
- Compatibilità degli altoparlanti: Suitable for 5-8 inch speakers with 4-8Ω impedance and 20-120W power.
- 2.1 Channel Audio System Support: Simultaneous speaker and headphone output allows connection to an active subwoofer for enhanced bass.
- Integrated Aluminum Case: Durevole ed esteticamente gradevoleasing design with crystal speaker jacks and a dynamic volume LED display.

Figure 3.1: Compact Size of the NS-20G Amppiù vivace
This image shows the Nobsound NS-20G amplifier being held in a hand, emphasizing its small and portable design.
4. Disposizione e connessioni del dispositivo
Familiarize yourself with the input and output ports on your NS-20G amppiù vivace.

Figura 4.1: Collegamenti del pannello anteriore e posteriore
This image displays the front and rear panels of the Nobsound NS-20G amplifier. The front panel shows the volume LED display, 3.5mm AUX input, and 3.5mm headphone output. The rear panel illustrates the DC12V-20VIN power input and the right and left channel speaker outputs.
5. Istruzioni per l'installazione
- Collegare gli altoparlanti: Collega gli altoparlanti passivi ai terminali di uscita degli altoparlanti sul retro del amplifier. Ensure correct polarity (red to red, black to black) for both left and right channels. The amplifier supports 5-8 inch speakers with 4-8Ω impedance and 20-120W power.
- Connect Audio Source (AUX): For wired audio, connect your audio device (e.g., TV, CD player, PC) to the 3.5mm AUX input on the front panel using the provided 3.5mm audio cable or an RCA to 3.5mm cable.
- Connetti alimentazione: Connect the provided power supply to the DC12V-20VIN port on the rear panel, then plug the power adapter into a wall outlet. The unit will auto-power on upon initial connection.
- Optional Headphone Connection: If using headphones, connect them to the 3.5mm PHONE output on the front panel. Note that only 15-32Ω headphones are supported.
- Optional Subwoofer Connection: To create a 2.1 channel system, connect the headphone output to an active subwoofer while passive speakers are connected to the speaker jacks.

Figure 5.1: Bluetooth Connectivity Example
This image shows the Nobsound NS-20G amplifier wirelessly connected to a smartphone via Bluetooth, demonstrating its compatibility with various devices for audio playback.
6. Istruzioni per l'uso
- Accensione/spegnimento: The unit will automatically power on when connected to power. To manually power on/off, long press the multifunction volume knob for 2 seconds.
- Controllo del volume: Rotate the multifunction volume knob to adjust the volume. The volume level (0-31) will be displayed on the LED screen.
- Selezione input: IL amplifier automatically detects the input source. When both AUX and Bluetooth are connected, the last active source will play. To switch between inputs, ensure the other source is paused or disconnected.
- Accoppiamento Bluetooth:
- Assicurare il amplifier è acceso.
- Attiva il Bluetooth sul tuo dispositivo audio (ad esempio, smartphone, tablet).
- Cercare "Nobsound NS-20G" or a similar device name in your device's Bluetooth settings.
- Selezionare il amplifier to pair. A confirmation sound may indicate successful pairing.
- Riproduci/Pausa: Short press the multifunction volume knob to play or pause audio. The LED screen will flash when music is paused.

Figure 6.1: Multifunction Volume Knob and Display
This image highlights the multifunction volume knob and the LED display on the Nobsound NS-20G amplifier, illustrating how to control volume and view impostazioni.
Video 6.1: Nobsound NS-20G Amplificatore Oltreview
This video provides a 30-second overview of the Nobsound NS-20G Mini Bluetooth 5.0 Power Amplificatore, showcasing its design, inputs, and outputs.
7. Manutenzione
- Pulizia: Utilizzare un panno morbido e asciutto per pulire il amplifier's exterior. Avoid using liquid cleaners or solvents.
- Ventilazione: Assicurare il amplifier has adequate ventilation to prevent overheating. Do not block ventilation openings.
- Magazzinaggio: Quando non viene utilizzato per lunghi periodi, conservare il amplifier in un luogo fresco e asciutto, lontano dalla luce solare diretta e da temperature estreme.
- Disconnessione dell'alimentazione: Disconnect the power supply from the wall outlet before cleaning or if the unit will be unused for a long time.
8. Risoluzione Dei Problemi
| Problema | Possibile causa | Soluzione |
|---|---|---|
| Nessuna uscita audio. |
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| Problemi di connessione Bluetooth. |
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| Unit gets warm during operation. |
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| Distorsione del suono o scarsa qualità. |
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9. Specifiche
| Caratteristica | Dettaglio |
|---|---|
| Marca | Douk Audio (Nobsound) |
| Numero di modello | DZ045S (NS-20G) |
| Potenza di uscita | 200 Watt (100W x 2) |
| Numero di canali | 2 |
| Versione Bluetooth | 5.0 + EDR + DSP |
| Ingresso volumetage (CC) | 9 - 20 Volts (Recommended 19V) |
| Corrente di alimentazione | 4.74 Amps |
| Impedenza delle cuffie | 15-32Ω |
| Impedenza dell'altoparlante | 4-8Ω |
| Materiale | Alluminio |
| Peso dell'articolo | 1.19 libbre |
| Dimensioni del pacco | 6.61 x 5.79 x 2.56 pollici |
10. Garanzia e supporto
For warranty information and technical support, please refer to the documentation included with your purchase or contact Douk Audio directly. You can often find support contact details on the manufacturer's official websito o tramite il rivenditore presso il quale è stato acquistato il prodotto.
Per ulteriori risorse e informazioni sui prodotti, puoi visitare il sito Negozio Douk Audio su Amazon.