Introducere
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.
Caracteristicile produsului
- De înaltă fidelitate audio: 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).
- Conectivitate Bluetooth 5.0: Offers seamless wireless connection with a range of over 15 meters in unobstructed environments.
- Protecție robustă: Include overvoltage, subvoltage, overheating, DC detection, and short circuit protection for enhanced safety and durability.
- Compatibilitate largă cu difuzoare: Adaptable to 10-100W, 4-8Ω speakers.
- Sursa de alimentare flexibila: Operates with a DC power supply ranging from 9V to 24V.
- Design compact: Measures 60x60x29mm, making it suitable for various applications and portable setups.
Conținutul pachetului
Vă rugăm să verificați dacă toate componentele sunt prezente în pachet:
- ZK-502H Ampconsiliu mai viu
- Top and Bottom Acrylic Plates
- Buton de volum
- Radiator
- Şurubelniţă
- Mounting Hardware (screws, standoffs)
- Cablu adaptor de alimentare DC

Image: All components included with the ZK-502H amplifier board, laid out for assembly.
Instrucțiuni de configurare
1. Assembly (Optional, if not pre-assembled)
- Attach the heat sink to the main chip on the ampscândură mai vie.
- Asigurați amplifier board between the two acrylic plates using the provided standoffs and screws.
- Install the volume knob onto the potentiometer shaft.
2. Conexiune la alimentare
- Asigurați 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.
- Important: Folosind un volum mai maretage within the specified range (e.g., 24V) is recommended for achieving higher power output.
3. Conexiune difuzor
- 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. Conectarea intrării audio
Choose one of the following audio input methods:
- 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.

Imagine: Sus view of the ZK-502H amplifier board, highlighting the AUX IN, Bluetooth, USB IN, DC IN, and speaker output terminals.
Instrucțiuni de operare
1. Pornire/Oprire
- 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 ampmai în viață.
2. Controlul volumului
- Rotate the large silver knob clockwise to increase volume.
- Rotate the large silver knob counter-clockwise to decrease volume.
3. Selectarea modului de introducere
The amplifier automatically detects the input source. If multiple sources are connected, it will prioritize them or switch based on activity.
- Mod Bluetooth: Când este pornit, amplifier will enter Bluetooth pairing mode. A voice prompt will confirm "Bluetooth Mode".
- Mod AUX: If an AUX cable is connected and playing audio, the amplifier will switch to AUX input.
- Mod USB: If a USB flash drive is inserted or connected to a computer, the amplifier will switch to USB input.
4. Asociere Bluetooth
- Asigurați 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.
Specificații
| Model de produs | ZK-502H |
| Soluție de cip | TPA3116D2 (with AM interference suppression) |
| Intrare audio | Bluetooth 5.0, AUX (3.5mm), USB Flash Drive, Computer USB Sound Card |
| Alimentare electrică | DC 9-24V |
| Putere de ieșire (Max) | 50W + 50W (at 24V, 4Ω) |
| Impedanta difuzorului | 4-8Ω |
| Putere difuzor | 10-100W |
| Numărul de canale | 2.0 Stereo (Left and Right) |
| Versiune Bluetooth | 5.0 |
| Gama Bluetooth | >15 meters (unobstructed) |
| Mecanisme de protecție | Overvoltage, Undervoltage, Overheating, DC Detection, Short Circuit Protection |
| Dimensiunile produsului | 60 x 60 x 29 mm |
| Greutatea produsului | Approximately 104g (including packaging) |
Power Output Table:
| Alimentare 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 |
Întreţinere
- Păstrați ampPlaca de alimentare curată și fără praf. Folosiți o cârpă moale și uscată pentru curățare.
- Evitați expunerea dispozitivului la umiditate, temperaturi extreme sau lumina directă a soarelui.
- Ensure proper ventilation to prevent overheating, especially during prolonged use at high volumes.
- Nu încercați să dezasamblați sau să modificați amplifier beyond the initial assembly steps, as this may void any potential warranty and could cause damage.
Depanare
| Problemă | Cauza posibila | Soluţie |
|---|---|---|
| Fără ieșire de sunet. |
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| Dispozitivul Bluetooth nu se poate conecta. |
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| Sunet distorsionat. |
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Garanție și suport
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.
Producător: EC Buying
Model: ZK-502H