1. Introducció
Gràcies per la compraasing the OBSBOT VD-AK45Pro Stereo Receiver Amplifier. This compact and powerful 2.0 channel amplifier is designed to enhance your home audio experience with versatile input options including Bluetooth 5.3, USB, SD card, RCA, FM radio, and two microphone inputs for karaoke or public address. Please read this manual carefully before operating the device to ensure proper use and optimal performance.
2. Instruccions de seguretat
- Do not expose this unit to rain or moisture to prevent fire or electric shock.
- No obriu el amplificador casing. No hi ha peces a l'interior que l'usuari pugui reparar. Demaneu totes les tasques de manteniment a personal de servei qualificat.
- Assegureu-vos que hi hagi una ventilació adequada al voltant de la unitat. No bloquegeu cap obertura de ventilació.
- Use only the specified power adapter (DC12V/5A or AC 110V-240V).
- Mantingueu la unitat allunyada de fonts de calor, llum solar directa i camps magnètics forts.
- Abans de fer cap connexió, assegureu-vos que ampl'amplificador està apagat i desendollat de la presa de corrent.
3. Contingut del paquet
Si us plau, comproveu que hi hagi tots els elements:
- VD-AK45Pro Stereo Receiver Ampmés viu
- Control remot
- Power Adapter (DC12V/5A or AC 110V-240V, depending on region)
- Manual d'usuari (aquest document)
4. Producte acabatview
4.1 Tauler frontal
- Interruptor d'alimentació: Encén/apaga la unitat.
- Port USB/SD: Per reproduir àudio filedes de unitats USB o targetes SD.
- Pantalla LED: Mostra el mode actual, la informació de la pista o la freqüència FM.
- Botó de mode: Canvia entre fonts d'entrada (Bluetooth, USB, SD, FM, RCA).
- Botó anterior: Salta a la pista/emissora anterior.
- Botó Reproduir/Pausa: Reprodueix o posa en pausa la reproducció d'àudio.
- Botó següent: Salta a la següent pista/emissora.
- Botó de cicle: Toggles repeat/loop modes for USB/SD playback.
- Pom treble: Adjusts the high-frequency audio level.
- Pom de baix: Adjusts the low-frequency audio level.
- Control de volum del micròfon: Ajusta el volum dels micròfons connectats.
- Entrades de micròfon (MIC1, MIC2): 6.35mm (1/4 inch) jacks for connecting microphones.
- Control de volum mestre: Ajusta el volum de sortida general.
4.2 Panell posterior
- FM.ANT: Connector for FM antenna.
- AUDIO INPUT (RCA): Stereo RCA input for external audio sources (e.g., CD/DVD player, TV).
- SPEAKERS OUTPUT (L/R): Terminals for connecting passive speakers (4-16 Ohms impedance).
- AC POWER INPUT (110V/220V): Power input for AC power cord.
- DC 12V/5A POWER INPUT: Alternative power input for DC 12V/5A adapter.
5. Instruccions de configuració
Abans de connectar, assegureu-vos que amplifier is turned OFF and unplugged from the power source.
5.1 Connectar altaveus
- Identify the left and right speaker output terminals on the rear panel.
- Connect your passive speakers (with an impedance of 4-16 Ohms) to the corresponding terminals. Ensure correct polarity (+ to + and - to -) for each speaker.
- Tighten the terminals securely to prevent loose connections.
5.2 Connexió de fonts d'àudio
The VD-AK45Pro supports multiple input modes:
- Entrada RCA: Connect external audio devices (e.g., CD/DVD player, TV, game console) to the RCA AUDIO INPUT jacks on the rear panel using an RCA cable.
- Targeta USB/SD: Insert a USB flash drive or SD card containing MP3/WMA audio files al port corresponent del panell frontal.
- Antena FM: Connect the provided FM antenna (or an external FM antenna) to the FM.ANT terminal on the rear panel for radio reception.
5.3 Connexió del micròfon
Connect up to two microphones to the MIC1 and MIC2 input jacks on the front panel. Adjust the Microphone Volume knob to control the microphone level.
5.4 Connexió d'alimentació
Connect the power adapter to the appropriate power input on the rear panel (either AC 110V-240V or DC 12V/5A) and then plug it into a wall outlet.
6. Instruccions de funcionament
6.1 Encès/Apagat
Press the Power Switch on the front panel to turn the amplifier ON or OFF. The LED display will illuminate when the unit is powered on.
6.2 Selecció d'entrada
Premeu el botó Mode button on the front panel or the remote control to cycle through the available input sources: Bluetooth (BT), USB, SD, FM, and RCA.
6.3 Control de volum
Gira el Volum mestre knob on the front panel clockwise to increase volume and counter-clockwise to decrease it. You can also use the volume buttons on the remote control.
6.4 Controls EQ
- Pom treble: Adjust to increase or decrease high-frequency sounds.
- Pom de baix: Adjust to increase or decrease low-frequency sounds.
- Control de volum del micròfon: Adjust the volume level of the connected microphones.
6.5 Vinculació Bluetooth
- Premeu el botó Mode button until "BLUE" or "BT" appears on the LED display. The amplifier is now in Bluetooth pairing mode.
- Al dispositiu mòbil (telèfon intel·ligent, tauleta, ordinador), activeu el Bluetooth i cerqueu els dispositius disponibles.
- Select "VD-AK45Pro" from the list of devices.
- Once paired, you will hear a confirmation tone, and the LED display will indicate a successful connection. You can now stream audio wirelessly.
Reproducció USB/SD de 6.6"
After inserting a USB drive or SD card, the amplifier will automatically switch to USB/SD mode and begin playing audio files. Use the Previous, Play/Pause, and Next buttons to control playback. The Cycle button can be used to toggle repeat modes.
6.7 Ràdio FM
- Premeu el botó Mode button until "FM" appears on the LED display.
- Use the Previous and Next buttons to manually tune to radio stations.
- For automatic scanning, press and hold the Play/Pause button. The amplifier will scan and save available stations.
6.8 Ús del control remot
The included remote control allows convenient operation from a distance. It provides access to input mode selection, volume control, track navigation, play/pause, and EQ adjustments.
7. Especificacions
| Característica | Especificació |
|---|---|
| Número de model | VD-AK45Pro |
| Canals | 2.0 (estèreo) |
| Potència de sortida RMS | 50W x 2 (100W total RMS) |
| Maximum Peak Power Output | 400W x 2 (PMPO) |
| Modes d'entrada | RCA, Bluetooth 5.3, USB, SD Card, MIC, FM |
| Impedància de l'altaveu | 4-16 ohms |
| Interval Bluetooth | Fins a 33 peus / 10 m |
| Distorsió harmònica total (THD) | ≤ 0.1% |
| Relació senyal/soroll (SNR) | 92 dB |
| Adaptador d'alimentació | DC12V/5A or AC 110V-240V |
| Pes net | 690 g (1.52 lb) |
| Dimensions (L x A x A) | 180 x 138 x 65 mm (7.1 x 5.44 x 2.56 polzades) |
8. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Sense poder | Power cable not connected or power outlet faulty. | Comproveu les connexions d'alimentació. Proveu una altra presa de corrent. |
| Sense sortida de so | Incorrect input selected, speaker wires loose, or volume too low. | Ensure correct input mode. Check speaker connections and polarity. Increase Master Volume. |
| L'aparellament de Bluetooth falla | Amplifier not in pairing mode, device too far, or interference. | Assegureu-vos amplifier is in BT mode. Move device closer. Turn off other Bluetooth devices. |
| Problemes de reproducció amb USB/SD | Sense suport file format, corrupted files, or card/drive not properly inserted. | Assegureu-vos files are MP3/WMA. Reinsert USB/SD. Try a different USB/SD. |
| Mala recepció FM | Antenna not connected or poor signal. | Connect FM antenna. Adjust antenna position for better reception. |
| El micròfon no funciona | Microphone not connected, Mic Volume too low, or microphone faulty. | Ensure microphone is securely plugged in. Increase Microphone Volume. Test with another microphone. |
9. Consells d'usuari
- Understanding Power Ratings: El amplifier is rated at 50W x 2 RMS (Root Mean Square) power, which is the continuous power output. The 400W x 2 mentioned is typically PMPO (Peak Music Power Output), representing the maximum instantaneous power. For consistent performance, refer to the RMS rating when matching with speakers.
- Optimal Speaker Matching: For best sound quality and to prevent damage, ensure your speakers have an impedance between 4 and 16 Ohms.
- Rang Bluetooth: Mentre que el amplifier supports Bluetooth 5.3 for stable connections, environmental factors like walls and other wireless devices can affect the 33 ft (10m) range. Keep your paired device within line of sight for optimal performance.
- Bateria de control remot: If the remote control is unresponsive, check and replace its battery.
10. Manteniment
- Neteja: Utilitzeu un drap suau i sec per netejar l'exterior amplifier. Do not use liquid cleaners or aerosols.
- Ventilació: Ensure the ventilation openings are free from dust and obstructions to prevent overheating.
- Emmagatzematge: If storing the unit for an extended period, unplug it from the power source and store it in a cool, dry place.
11. Garantia i Suport
For warranty information or technical support, please refer to the seller's policy or contact the retailer where you purchased the product. Keep your purchase receipt as proof of purchase.
