1. Introducció
This manual provides detailed instructions for the proper setup, operation, and maintenance of your Douk Audio Mini Bluetooth Amplifier G3. Please read this manual thoroughly before using the device to ensure safe and optimal performance. This amplifier is designed to deliver high-fidelity audio for home stereo speakers with versatile connectivity options.

Image 1.1: The Douk Audio Mini Bluetooth Amplifier G3, showcasinel seu disseny compacte i els controls del panell frontal.
2. Producte acabatview
2.1. Controls del tauler frontal

Imatge 2.1: Detallada view de la amplifier's front panel, indicating the power indicator, bass control, treble control, and multi-function volume knob.
- Indicador d'alimentació: S'il·lumina quan el ampel lifier està encès.
- Control de baix: Adjusts the low-frequency output. Rotate clockwise to increase bass, counter-clockwise to decrease.
- Control dels aguts: Adjusts the high-frequency output. Rotate clockwise to increase treble, counter-clockwise to decrease.
- Multi-function Knob (Volume / Power):
- Gireu en sentit horari per augmentar el volum, en sentit antihorari per disminuir-lo.
- Rotate fully counter-clockwise until a click is heard to power off the unit. Rotate clockwise from the off position to power on.
2.2. Connexions del panell posterior

Imatge 2.2: Detallada view de la amplifier's rear panel, showing the Bluetooth antenna, AUX input, speaker outputs, and DC power input.
- Antena Bluetooth: Connect the provided antenna for stable Bluetooth signal reception.
- Entrada AUX (3.5 mm): Connect audio sources such as smartphones, tablets, PCs, or CD players using a 3.5mm audio cable.
- Speaker Output (Banana Plugs/Binding Posts): Connect passive stereo speakers. Ensure correct polarity (+ to + and - to -).
- DC 15V-24V Input: Connecteu l'adaptador de corrent proporcionat a aquest port.
3. Instruccions de configuració
Follow these steps to set up your Douk Audio Mini Bluetooth Amplifier G3:
- Connectar els altaveus: Using speaker wire, connect your passive stereo speakers to the speaker output terminals on the rear panel. Ensure the positive (+) terminal on the amplifier connects to the positive (+) terminal on your speaker, and the negative (-) terminal connects to the negative (-).
- Connecteu l'antena Bluetooth: Screw the provided Bluetooth antenna into the designated port on the rear panel.
- Connectar l'alimentació: Plug the DC output of the provided power adapter into the DC 15V-24V input port on the amplifier's rear panel. Then, plug the power adapter into a wall outlet.
- Encès: Rotate the multi-function knob (volume/power) clockwise until you hear a click and the power indicator light on the front panel illuminates.

Imatge 3.1: El/La amplifier and its included 19V power adapter, as part of the packing list.
4. Instruccions de funcionament
4.1. Connexió Bluetooth
The Douk Audio G3 features Bluetooth 5.0 for wireless audio streaming.
- Assegureu-vos el ampel lifier està encès.
- Al dispositiu amb Bluetooth (telèfon intel·ligent, tauleta, ordinador), aneu a la configuració de Bluetooth.
- Cerca available devices. The amplifier will appear as "Douk Audio G3" or a similar name.
- Seleccioneu el amplifier to pair. Once paired, your device will confirm the connection.
- You can now play audio from your device, and it will be transmitted wirelessly to the ampmés viu.

Imatge 4.1: Il·lustració de la amplifier's Bluetooth 5.0 capability, enabling wireless connection to mobile devices.
4.2. Connexió d'entrada AUX
For wired audio sources, use the 3.5mm AUX input.
- Connect one end of a 3.5mm audio cable to the AUX input port on the amplifier's rear panel.
- Connect the other end of the 3.5mm audio cable to the headphone jack or audio output of your source device (e.g., PC, CD player).
- El amplifier will automatically switch to AUX input when a cable is detected.
4.3. Adjusting Audio
- Volum: Use the large multi-function knob on the front panel to adjust the overall volume.
- Gravs/Aguts: Use the dedicated Bass and Treble knobs to fine-tune the low and high frequencies according to your preference.

Image 4.2: The Douk Audio G3 amplifier integrated into a home audio setup, demonstrating its wide application.
5. Especificacions
| Característica | Especificació |
|---|---|
| Marca | Douk Audio |
| Número de model | JP-ZJX-31 (G3) |
| Dimensions de l'article (L x A x A) | 4.2 x 3.4 x 1.2 polzades (10.7 x 8.7 x 3.0 cm) |
| Pes de l'article | 10 unces (286 grams) |
| Potència de sortida | Up to 100 Watts (TPA3116 chip) |
| Nombre de canals | 2 (estèreo) |
| Versió Bluetooth | 5.0 |
| Interfície d'entrada | Bluetooth, 3.5 mm AUX |
| Subministrament Voltage Rang | CC 15V - 24V |
| Fabricant | Nobsound |
6. Solució De Problemes
If you encounter issues with your Douk Audio G3 amplifier, consulteu els següents problemes i solucions habituals:
- Sense so:
- Assegureu-vos el amplifier is powered on and the power indicator light is illuminated.
- Check all cable connections (power, speakers, audio source) for secure fit.
- Verify the volume knob is not set to minimum.
- If using Bluetooth, ensure the device is properly paired and connected. Try unpairing and re-pairing.
- If using AUX, ensure the cable is fully inserted and the source device is playing audio.
- Test with a different audio source or speakers to isolate the problem.
- So distorsionat:
- Redueix el volum en tots dos amplificador i la font d'àudio.
- Comproveu les connexions dels cables de l'altaveu per si hi ha fils solts o curtcircuits.
- Ensure the impedance of your speakers is compatible (3-8 ohms recommended).
- Adjust Bass and Treble controls to a neutral position or slightly lower.
- Bluetooth Disconnection/Unstable Connection:
- Assegureu-vos que l'antena Bluetooth estigui ben connectada.
- Move the audio source closer to the amplificador per reduir les interferències.
- Eviteu col·locar el amplifier near other wireless devices that may cause interference (e.g., Wi-Fi routers, microwaves).
- Try restarting both the amplifier and the Bluetooth source device.
- La unitat no s'encén:
- Verify the power adapter is securely connected to both the amplificador i la presa de corrent.
- Assegureu-vos que la presa de corrent de la paret funciona provant-la amb un altre dispositiu.
- Confirm the multi-function knob is rotated clockwise past the 'off' click.
7. Manteniment
To ensure the longevity and optimal performance of your Douk Audio G3 amplificador, seguiu aquestes pautes de manteniment:
- Neteja: Utilitzeu un drap suau i sec per netejar l'exterior amplifier. Do not use liquid cleaners, aerosols, or abrasive materials, as they may damage the finish or internal components.
- Col·locació: Col·loca el amplifier on a stable, flat surface with adequate ventilation. Avoid placing it in direct sunlight, near heat sources, or in areas with high humidity or dust.
- Manipulació: Manipuleu la unitat amb cura. Eviteu deixar-la caure ni sotmetre-la a impactes forts.
- Apagueu quan no estigui en ús: Si el amplifier will not be used for an extended period, it is recommended to power it off and unplug it from the wall outlet.
8. Garantia i Suport
For warranty information and technical support, please refer to the official Douk Audio weblloc web o contacteu directament amb el seu servei d'atenció al client. Conserveu el rebut de compra com a comprovant de compra per a qualsevol reclamació de garantia.
You may also find additional resources and a PDF user manual at the following link: Douk Audio G3 User Manual (PDF)





