1. Introducció
The JOYO JA-03 Tube Drive Mini Guitar Pocket Amplifier is a compact and portable device designed for guitarists to practice silently with headphones. It features a 'Tube Drive' sound effect, allowing for a range of tones from clean to overdriven. This manual provides detailed instructions for the proper setup, operation, and maintenance of your JA-03 ampmés viu.
2. Informació de seguretat
- No exposeu la unitat a la pluja o la humitat.
- Avoid operating the unit near heat sources or in direct sunlight.
- Feu servir només el tipus de pila especificat (2 piles AAA).
- No intenteu desmuntar ni modificar la unitat. Encarregueu tot el manteniment a personal qualificat.
- Mantenir fora de l'abast dels nens.
3. Contingut del paquet
- JOYO JA-03 Tube Drive Mini Guitar Pocket Ampmés viu
- 2 x piles AAA
- Manual d'usuari
4. Producte acabatview
Familiarize yourself with the components of your JOYO JA-03 ampmés viu:

Imatge: Superior view of the JOYO JA-03 amplifier, showing the input jack, output jack, control knobs, and battery compartment.
- Jack d'entrada de guitarra: Connects directly to your electric guitar.
- MP3 Input Jack (AUX IN): 3.5mm jack for connecting an external audio source like an MP3 player or smartphone.
- Earphone Output Jack (PHONE): Jack de 3.5 mm per connectar auriculars.
- Control GAIN: Ajusta la quantitat de sobremarxa o distorsió.
- Control de TO: Adjusts the tonal characteristics, from darker to brighter.
- Control de VOLUM: Adjusts the overall output level to your headphones.
- POWER ON/OFF Switch: Gira el ampmés viu encès o apagat.
- Compartiment de la bateria: Conté dues piles AAA.
5. Configuració
5.1 Instal·lació de la bateria
The JA-03 amplifier requires two AAA batteries for operation.
- Localitzeu la tapa del compartiment de la bateria a la part posterior de la unitat.
- Feu lliscar la coberta oberta.
- Introduïu dues piles AAA, assegurant-vos de la polaritat correcta (+/-) tal com s'indica a l'interior del compartiment.
- Tanqueu bé la tapa del compartiment de la bateria.

Image: The JOYO JA-03 amplifier with its battery compartment open, showing the slots for two AAA batteries.
5.2 Connecting to Guitar
Plug the 1/4-inch jack of the JA-03 amplifier directly into your electric guitar's output jack.
5.3 Connectar auriculars
Connect your headphones to the 3.5mm Earphone Output Jack (PHONE) on the ampmés viu.

Image: A musician playing a bass guitar with the JOYO JA-03 amplifier plugged into the instrument and headphones connected to the ampmés viu.
5.4 Connecting an MP3 Player (AUX In)
To play along with backing tracks, connect your MP3 player or smartphone to the 3.5mm MP3 Input Jack (AUX IN) using a standard 3.5mm audio cable (not included).
6. Funcionament
6.1 Encès/Apagat
Slide the POWER ON/OFF switch to the 'ON' position to power on the amplifier. A small LED indicator will illuminate. Slide the switch to 'OFF' when not in use to conserve battery life.
6.2 Ajust dels controls
Use the three control knobs to shape your sound:
- GUANY: Rotate this knob clockwise to increase the amount of overdrive and distortion, achieving the 'Tube Drive' effect. Rotate counter-clockwise for cleaner tones.
- TO: Adjusts the brightness or darkness of your sound. Turn clockwise for a brighter, more cutting tone, and counter-clockwise for a warmer, mellower tone.
- VOLUM: Controls the overall loudness of the sound heard through your headphones. Adjust to a comfortable listening level.

Imatge: Un primer pla view of the JOYO JA-03 amplifier's control knobs, labeled GAIN, TONE, and VOLUME.
7. Manteniment
- Neteja: Netegeu la unitat amb un drap suau i sec. No utilitzeu productes de neteja abrasius ni dissolvents.
- Emmagatzematge: When not in use for extended periods, remove the batteries to prevent leakage. Store the amplificador en un lloc fresc i sec, allunyat de la llum solar directa.
- Substitució de la bateria: Replace batteries when the sound becomes weak or distorted, or the LED indicator fails to light up.
8. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Sense so |
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| So feble o distorsionat |
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| Soroll de brunzit o brunzit |
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9. Especificacions
| Característica | Especificació |
|---|---|
| Model | JA-03 |
| Efecte de so | Conducció de tub |
| MP3 Input Jack | 3.5 mm |
| Jack de sortida d'auriculars | 3.5 mm |
| Poder | 2 x piles AAA |
| Material | Acrilonitril butadiè estirè (ABS) |
| Dimensions (L x A x A) | 89 mm x 77 mm x 26 mm (3.5 x 3.03 x 1.02 polzades) |
| Pes | 54 g (1.9 unces) |
| Dispositius compatibles | Guitarra elèctrica |
10. Garantia
JOYO products are manufactured to high-quality standards. This product is covered by a limited warranty against defects in materials and workmanship. Please retain your proof of purchase for warranty claims. Specific warranty terms and duration may vary by region. For detailed warranty information, please refer to the official JOYO weblloc web o poseu-vos en contacte amb el vostre distribuïdor local.
11. Suport
For further assistance, technical support, or inquiries regarding your JOYO JA-03 amplifier, please visit the official JOYO website or contact JOYO customer service through the retailer where the product was purchased. You can also find additional resources and FAQs on the JOYO brand store page on Amazon: JOYO Official Store.





