1. Produktet er slutview
The Walfront ZK-502L is a compact and versatile Bluetooth 5.0 stereo audio amplifier module designed for DIY speaker projects. It offers robust power output and various protection features, making it suitable for a wide range of audio applications, including home audio systems and car audio modifications.
Figure 1: ZK-502L Bluetooth Power Amplifier Board. This image shows the compact design of the amplifier board with its various components, including the volume potentiometer, power input, and speaker terminals.
2. Nøglefunktioner
- Bluetooth 5.0-forbindelse: Enables direct wireless audio streaming from compatible devices.
- Bredt strømforsyningsområde: Operates with DC 5-24V, compatible with various power adapters, including most laptop power ports.
- Høj kompatibilitet: Supports a variety of speakers with impedances from 4Ω to 8Ω and power ratings from 30W to 200W.
- Built-in Filter Capacitor: Enhances sound signal processing for clearer audio output.
- Integrated Potentiometer: Knob design for convenient power ON/OFF and volume adjustment.
- Robuste beskyttelsesmekanismer: Features reverse connection protection, overvoltage beskyttelse, undervoltage protection, over-temperature protection, short circuit protection, and self-recovery overheating protection.
- Clean Audio Performance: Designed to eliminate POPs sound during power-on, song skipping, and pausing.
- Acrylic Protective Shell: Provides physical protection for the board components.
Figur 2: Detaljeret view of the ZK-502L board highlighting key components and protection features.
3. Tekniske specifikationer
| Parameter | Værdi |
|---|---|
| Model | ZK 502L |
| Bluetooth version | 5.0 |
| Kanaler | 2 (stereo) |
| Input bindtage | DC 5V-24V |
| Udgangseffekt | Up to 50W per channel (Total 100W) |
| Tilpasset højttalerimpedans | 4Ω-8Ω |
| Tilpasset højttalerstyrke | 30W-200W |
| Signal-støj-forhold (SNR) | >90 dB |
| Kommunikationsafstand | Up to 15 meters (Max, unobstructed) |
| Dimensioner (pakke) | 4.61 x 2.68 x 1.85 tommer |
| Varens vægt | 2.82 ounce |
Figure 3: Physical dimensions and key electrical specifications of the ZK-502L board.
4. Opsætningsvejledning
4.1. Pakkens indhold
Før installationen påbegyndes, skal du sørge for, at alle komponenter er til stede:
- ZK-502L Bluetooth Power Amplivligere bestyrelse
- Acrylic protective shell components
- Monteringsudstyr (skruer, afstandsstykker)
- DC power cable with 2.1mm jack
- Small screwdriver (for terminal connections)
Figure 4: Contents of the ZK-502L amplifier kit, including the board, protective casing, and accessories.
4.2. Strømtilslutning
Connect a DC power supply (5V-24V) to the amplifier board. You can use either the DC 2.1mm socket or the terminal block labeled "DC5-24V". Ensure correct polarity when using the terminal block (+ to +, - to -) to prevent damage. For high power output, a higher voltage (e.g., 12V or 24V) is recommended.
4.3. Højttalerforbindelse
Connect your speakers to the output terminals on the board. The board supports two channels (stereo). Ensure that the positive (+) and negative (-) terminals of each speaker are connected to the corresponding terminals on the amplifier board. The board is compatible with speakers having an impedance of 4Ω to 8Ω.
Figure 5: Diagram illustrating the correct connection of speakers and power supply to the ZK-502L amplivligere bræt.
5. Betjeningsvejledning
5.1. Tænd/sluk og lydstyrkekontrol
The integrated knob potentiometer controls both power and volume. Rotate the knob clockwise to turn the unit ON and increase volume. Rotate counter-clockwise to decrease volume and turn the unit OFF.
5.2. Bluetooth-parring
- Sørg for amplifier board is powered on. The LED indicator will flash, indicating it is in Bluetooth pairing mode.
- Aktiver Bluetooth på din mobilenhed (smartphone, tablet osv.) og søg efter tilgængelige enheder.
- Locate and select the device named "BT-WUZHI" (or similar, as indicated by a voice prompt "Beep").
- Once successfully paired, the LED indicator on the amplifier board will remain steadily lit.
5.3. Afspilning af lyd
After successful pairing, you can play audio from your connected device. The amplifier board will output the audio through the connected speakers. Use the potentiometer knob to adjust the overall volume. A voice prompt will sound if the Bluetooth connection is disconnected.
Figure 6: Visual guide demonstrating the steps for connecting and using the ZK-502L amplifier board with a mobile device and speakers.
6. Fejlfinding
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Ingen strøm/LED slukket | Incorrect power connection; Power supply issue; Potentiometer turned off. | Bekræft strømforsyningen voltage (5-24V) and polarity. Ensure power adapter is functional. Rotate potentiometer clockwise to turn on. |
| Ingen lydudgang | Speakers not connected correctly; Bluetooth not paired; Volume too low; Damaged speakers. | Check speaker wiring and polarity. Confirm Bluetooth is paired (LED solid). Increase volume on both amplifier and source device. Test with different speakers. |
| Bluetooth connection unstable/drops | Enheden er for langt væk amplifier; Interference from other devices; Low battery on source device. | Reduce distance between amplifier and source device (max 15m). Move away from strong Wi-Fi routers or other Bluetooth devices. Ensure source device has sufficient battery. |
| Forvrænget lyd | Volume too high (clipping); Speaker impedance mismatch; Faulty audio source. | Reduce volume. Ensure speakers are 4Ω-8Ω. Test with a different audio source. |
| "POPs" sound | This model is designed to prevent POPs sound. If experienced, check power supply stability or speaker connections. | Ensure stable power supply. Re-check all connections. If issue persists, contact support. |
7. Vedligeholdelse
- Rensning: Brug en blød, tør klud til at rengøre amplifier board and protective casing. Avoid using liquid cleaners or solvents.
- Opbevaring: Når den ikke er i brug i længere perioder, skal den opbevares ampOpbevar apparatet på et køligt, tørt sted, væk fra direkte sollys og ekstreme temperaturer.
- Håndtering: Håndter printpladen forsigtigt for at undgå at beskadige elektroniske komponenter. Undgå statisk elektricitet.
8. Garanti og support
Walfront products are manufactured to high quality standards. For information regarding warranty coverage and terms, please refer to the documentation provided with your purchase or contact your retailer.
For technical assistance or inquiries, please contact Walfront customer support through the official Walfront store on Amazon or their designated support channels. Provide your product model (ZK 502L) and a detailed description of your issue for efficient service.
Online ressourcer:
- Walfront Store on Amazon: Visit the Walfront Store