Uvod
The EC Buying ZK-502H is a high-fidelity 2.0 stereo digital power amplifier module designed to deliver clear and powerful audio. Featuring the TPA3116D2 chip, this amplifier board provides 50W+50W output and supports multiple audio input sources including Bluetooth 5.0, AUX, and USB. It is equipped with various protection mechanisms to ensure stable and secure performance.
Karakteristike proizvoda
- Audio visoke vjernosti: Delivers 50W+50W output with the TPA3116D2 chip for crystal-clear stereo sound.
- Multiple Input Sources: Supports Bluetooth 5.0, AUX (3.5mm jack), USB flash drive, and computer USB sound card (plug and play).
- Bluetooth 5.0 povezivanje: Offers seamless wireless connection with a range of over 15 meters in unobstructed environments.
- Robusna zaštita: Uključuje overvoltage, undervoltage, overheating, DC detection, and short circuit protection for enhanced safety and durability.
- Wide Speaker Compatibility: Adaptable to 10-100W, 4-8Ω speakers.
- Fleksibilno napajanje: Operates with a DC power supply ranging from 9V to 24V.
- Kompaktan dizajn: Measures 60x60x29mm, making it suitable for various applications and portable setups.
Sadržaj paketa
Molimo Vas da provjerite da li se u Vašem paketu nalaze sve komponente:
- ZK-502H Ampdaska za dizanje
- Top and Bottom Acrylic Plates
- Tipka za jačinu zvuka
- Heat Sink
- Odvijač
- Pribor za montažu (vijci, odstojnici)
- DC adapterski kabel

Image: All components included with the ZK-502H amplifier board, laid out for assembly.
Uputstva za postavljanje
1. Assembly (Optional, if not pre-assembled)
- Attach the heat sink to the main chip on the ampploča za podizanje.
- Osigurajte amplifier board between the two acrylic plates using the provided standoffs and screws.
- Install the volume knob onto the potentiometer shaft.
2. Priključak za napajanje
- Osigurajte amplifier is switched off and the volume knob is set to minimum.
- Connect a DC power supply (9-24V) to the DC IN port (labeled DC9-24V). Use the provided DC power adapter cable if necessary.
- Važno: Koristeći veći obimtage within the specified range (e.g., 24V) is recommended for achieving higher power output.
3. Povezivanje zvučnika
- Connect your passive speakers to the speaker output terminals (labeled L+, L-, R+, R-).
- Ensure correct polarity: positive (+) to positive, negative (-) to negative for each channel.
- The amplifier supports speakers with an impedance of 4-8Ω and power rating of 10-100W.
4. Audio ulazna veza
Odaberite jednu od sljedećih metoda audio unosa:
- Bluetooth: No physical connection needed. Proceed to Operating Instructions for pairing.
- AUX: Connect an audio source (e.g., smartphone, MP3 player) to the 3.5mm AUX IN jack using an audio cable.
- USB: Insert a USB flash drive into the USB IN port or connect the amplifier to a computer via USB for use as a sound card.

Slika: Vrh view of the ZK-502H amplifier board, highlighting the AUX IN, Bluetooth, USB IN, DC IN, and speaker output terminals.
Uputstvo za upotrebu
1. Uključivanje/isključivanje
- Press the ON/OFF button to power on the amplifier. A blue indicator light will illuminate.
- Press the ON/OFF button again to power off the amplifier.
2. Kontrola jačine zvuka
- Rotate the large silver knob clockwise to increase volume.
- Rotate the large silver knob counter-clockwise to decrease volume.
3. Odabir načina unosa
The amplifier automatically detects the input source. If multiple sources are connected, it will prioritize them or switch based on activity.
- Bluetooth način rada: Kada se uključi, amplifier will enter Bluetooth pairing mode. A voice prompt will confirm "Bluetooth Mode".
- AUX način rada: If an AUX cable is connected and playing audio, the amplifier will switch to AUX input.
- USB način rada: If a USB flash drive is inserted or connected to a computer, the amplifier will switch to USB input.
4. Bluetooth uparivanje
- Osigurajte amplifier is powered on and in Bluetooth mode (indicated by a voice prompt).
- On your audio device (e.g., smartphone, tablet), enable Bluetooth and search for available devices.
- Select "ZK-502H" from the list of devices to pair.
- Once paired, a voice prompt will confirm the connection. You can now play audio from your device.
Specifikacije
| Model proizvoda | ZK-502H |
| Chip Solution | TPA3116D2 (with AM interference suppression) |
| Audio ulaz | Bluetooth 5.0, AUX (3.5mm), USB Flash Drive, Computer USB Sound Card |
| Napajanje | DC 9-24V |
| Izlazna snaga (maks.) | 50W + 50W (at 24V, 4Ω) |
| Impedansa zvučnika | 4-8Ω |
| Snaga zvučnika | 10-100W |
| Broj kanala | 2.0 Stereo (Left and Right) |
| Bluetooth verzija | 5.0 |
| Bluetooth domet | >15 meters (unobstructed) |
| Mehanizmi zaštite | Overvoltage, Undervoltage, Overheating, DC Detection, Short Circuit Protection |
| Dimenzije proizvoda | 60 x 60 x 29 mm |
| Težina proizvoda | Approximately 104g (including packaging) |
Power Output Table:
| Napajanje Voltage | 8Ω Speaker Output | 4Ω Speaker Output |
|---|---|---|
| 12V | 12W + 12W | 20W + 20W |
| 15V | 18W + 18W | 30W + 30W |
| 19V | 32W + 32W | 40W + 40W |
| 24V | 38W + 38W | 50W + 50W |
Održavanje
- Zadrži ampPloča za podizanje je čista i bez prašine. Za čišćenje koristite meku, suhu krpu.
- Izbjegavajte izlaganje uređaja vlazi, ekstremnim temperaturama ili direktnoj sunčevoj svjetlosti.
- Ensure proper ventilation to prevent overheating, especially during prolonged use at high volumes.
- Ne pokušavajte rastavljati ili modificirati amplifier beyond the initial assembly steps, as this may void any potential warranty and could cause damage.
Rješavanje problema
| Problem | Mogući uzrok | Rješenje |
|---|---|---|
| Nema izlaza zvuka. |
|
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| Bluetooth uređaj se ne može upariti. |
|
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| Izobličen zvuk. |
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Garancija i podrška
For product support, technical assistance, or warranty inquiries, please contact EC Buying customer service through the retailer where the product was purchased. Please retain your proof of purchase for any warranty claims.
Proizvođač: EC Buying
Model: ZK-502H