1. Introducció
Thank you for choosing the Fonestar AS-24U Hi-Fi USB/SD/MP3 Amplifier. This manual provides essential information for the safe and efficient operation of your device. Please read it thoroughly before use and retain it for future reference.
2. Instruccions de seguretat
- Font d'alimentació: Assegureu-vos el amplifier is connected to a power source matching the specified voltage (230 V).
- Ventilació: No bloquegeu les obertures de ventilació. Deixeu prou espai al voltant de la unitat per a un flux d'aire adequat per evitar el sobreescalfament.
- Humitat: Mantenir el amplifier away from water, moisture, and high humidity environments. Do not expose it to dripping or splashing.
- Fonts de calor: Eviteu col·locar la unitat a prop de fonts de calor com ara radiadors, registres de calor, estufes o altres aparells que produeixin calor.
- Neteja: Desconnecteu el cable d'alimentació abans de netejar. Feu servir un drap sec i suau. No utilitzeu netejadors líquids ni netejadors en aerosol.
- Manteniment: No intenteu atendre aquest producte vosaltres mateixos. Consulteu tots els serveis a personal de servei qualificat.
- Entrada d'objecte/líquid: No introduïu mai cap objecte dins d'aquest producte a través de les obertures, ja que poden tocar un volum perillóstage punts o curtcircuitar peces que podrien provocar un incendi o una descàrrega elèctrica.
3. Producte acabatview
3.1 Tauler frontal
The front panel features controls for power, input selection, volume adjustment, and USB/SD media playback. It also includes a display for media information.

Imatge 1: Frontal view of the Fonestar AS-24U amplifier, showing the main controls and display.
3.2 Panell posterior
The rear panel provides all necessary connections for audio input sources, speaker outputs, and power.

Imatge 2: posterior view of the Fonestar AS-24U amplifier, detailing input/output ports and power connection.
- INPUT (AUX, TUNER, CD): RCA stereo inputs for connecting external audio sources.
- SPEAKER OUT (STEREO): Spring clip terminals for connecting passive speakers (4-8 Ω).
- SPEAKER OUT (SURROUND): Additional spring clip terminals for surround speakers (8 Ω).
- POTÈNCIA D'ENTRADA: AC power input for the main power cable.
- VOLTAGE SELECTOR: Switch for selecting between 115V and 230V power input. Ensure this is set correctly for your region.
3.3 Control remot
El comandament a distància inclòs permet un funcionament còmode del amplifier's media playback functions.

Image 3: Remote control for the Fonestar AS-24U amplifier, showing buttons for media playback and display control.
- PANTALLA ON/OFF: Toggles the front panel display.
- PLAY/PAUSE, PREVIOUS/NEXT: Controls for media playback.
- SD/USB: Selects between SD card and USB drive as the media source.
- -10/+10: Skips tracks by 10.
- ID3: Displays ID3 tag informació per a MP3 files.
- REPETIR: Toggles repeat modes (e.g., repeat one, repeat all).
- ALeatori: Toggles random playback.
4. Configuració
4.1 Connectar altaveus
- Assegureu-vos el amplifier is powered off and unplugged.
- Connect your passive speakers to the SPEAKER OUT terminals on the rear panel.
- Match the positive (+) terminal on the amplifier to the positive (+) terminal on your speaker, and the negative (-) to the negative (-).
- For stereo speakers, use the 4-8 Ω terminals. For surround speakers, use the 8 Ω terminals. Ensure your speakers' impedance matches the ampespecificacions del lifier.
4.2 Connexió de fonts d'àudio
- Connect your audio devices (e.g., CD player, tuner, auxiliary device) to the corresponding RCA INPUT jacks (CD, TUNER, AUX) on the rear panel.
- Ensure left and right channels are correctly matched (red for right, white for left).
4.3 Connexió d'alimentació
- Verifica el VOLTAGE SELECTOR switch on the rear panel is set to the correct voltage for your region (e.g., 230V).
- Connect the power cable to the POWER IN socket on the rear panel and then to a suitable wall outlet.
5. Instruccions de funcionament
5.1 Engegada/apagada
Press the power button on the front panel to turn the amplifier on or off. A soft start protection circuit is integrated.
5.2 Selecció de la font d'entrada
Use the input selector knob or buttons on the front panel to choose between CD, TUNER, AUX, USB, or SD inputs.
5.3 Ajust del volum
Rotate the main volume knob on the front panel to adjust the overall sound level. Start with a low volume and gradually increase it to a comfortable listening level.
Reproducció USB/SD de 5.4"
- Inseriu una unitat flash USB o una targeta SD que contingui àudio MP3 files into the respective slot on the front panel.
- Select the USB or SD input using the input selector.
- Use the playback controls (Play/Pause, Previous/Next) on the front panel or remote control to manage your music.
- The remote control allows for additional functions like skipping 10 tracks (+10/-10), displaying ID3 tags, repeating tracks, and random playback.
6. Manteniment
6.1 Neteja
Per netejar el amplifier, first unplug it from the power outlet. Use a soft, dry cloth to wipe down the exterior surfaces. Do not use abrasive cleaners, waxes, or solvents as they may damage the finish.
6.2 Emmagatzematge
Si emmagatzema el amplifier for an extended period, ensure it is unplugged, clean, and stored in a cool, dry place away from direct sunlight and extreme temperatures.
7. Solució De Problemes
- Sense energia:
- Comproveu si el cable d'alimentació està connectat correctament a tots dos amplificador i la presa de corrent.
- Assegureu-vos que la presa de corrent de la paret funcioni.
- Verifica el VOLTAGE SELECTOR switch is set correctly.
- Sense so:
- Confirm that the correct input source is selected.
- Comproveu totes les connexions dels altaveus per assegurar-vos que la polaritat sigui correcta i que encaixin bé.
- Assegureu-vos que el volum estigui pujat i no silenciat.
- Prova amb una font d'àudio diferent.
- So distorsionat:
- Redueix el volum.
- Check speaker impedance compatibility.
- Assegureu-vos que els cables d'àudio no estiguin danyats i que estiguin connectats correctament.
- Problemes de reproducció amb USB/SD:
- Ensure the USB drive or SD card is formatted to a compatible file sistema (per exemple, FAT32).
- Comproveu que l'àudio fileestan en format MP3.
- Prova una altra unitat USB o targeta SD.
8. Especificacions
| Marca | FONESTAR |
| Model | AS-24U |
| Stereo Power Output | 25 + 25 W max, 15 + 15 W RMS (4 Ω), 12 + 12 W RMS (8 Ω) |
| Surround Power Output | 10 + 10 W max, 6 + 6 W RMS (8 Ω) |
| Entrades | 3 stereo (CD, Tuner, AUX), 2 x RCA 400 mV |
| Proteccions | Soft start, short circuit, overload |
| Voltage | 230 Volts |
| Dimensions (L x A x A) | 5 x 5 x 10 cm (aprox. 50 x 50 x 100 mm) |
| Pes | 1.9 kg |
| Connectivitat dels altaveus | Amb cable |
9. Garantia i Suport
This Fonestar AS-24U amplifier comes with a standard manufacturer's warranty. Please refer to the warranty card included with your purchase for specific terms and conditions. For technical support, service, or warranty claims, please contact your retailer or the official Fonestar customer service.





