Wuzhi Audio ZK-502L Mini Bluetooth 5.0 Amplifier Board 50W+50W Stereo Module
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৳ 500.00৳ 550.00 (-9%)
This ultra-compact Wuzhi Audio ZK-502L Bluetooth Amplifier Board delivers powerful 50W+50W dual-channel stereo output for minimalist DIY audio projects. Powered by high-efficiency Class-D technology, it features stable Bluetooth 5.0 wireless streaming and focuses on a clean, wireless design without analog input ports. An integrated rotary volume dial functions as a physical on/off switch, letting you effortlessly power up or shut down connected 4-Ohm to 8-Ohm passive speakers.
Wuzhi Audio ZK-502L Mini 50W+50W Dual-Channel Bluetooth Stereo Amplifier Board
Overview
The Wuzhi Audio ZK-502L is an ultra-compact, high-efficiency dual-channel digital power amplifier board engineered for clean, minimalist custom audio systems. Delivering up to 50 Watts per channel into left and right stereo outputs, this miniature module is perfect for building standalone portable Bluetooth speakers, upgrading passive desktop monitors, or converting vintage speaker cabinets into modern wireless audio systems. Its low-profile, double-plated protective acrylic enclosure ensures rugged durability on the test bench or inside your custom speaker builds.
Pure Wireless Connectivity
This module features a pure wireless digital audio interface designed for users looking to streamline their audio setups without analog input cables:
- Wireless Bluetooth 5.0: Provides low-latency, high-bandwidth wireless audio streaming from smartphones, tablets, or laptops over distances up to 15 meters.
- Streamlined Design: Focuses strictly on high-fidelity Bluetooth decoding, omitting traditional 3.5mm AUX lines and USB sound card interfaces to deliver a cleaner, noise-free wireless signal path.
Integrated Power and Volume Management
The ZK-502L consolidates power switching and system attenuation into a single, user-friendly control interface. It features a robust central rotary potentiometer capped with a high-grip, silver-finished aluminum volume knob. Rotating the dial completely counterclockwise results in a noticeable “click” that completely breaks the internal power circuit, saving you the hassle of drilling and wiring a separate standalone power toggle switch.
Technical Specifications
- Manufacturer Model: Wuzhi Audio ZK-502L
- Core Amplifier Architecture: Class-D Digital Audio IC
- Input Operating Voltage: DC 5V to 24V (Standard 5.5mm x 2.1mm DC power jack)
- Maximum Output Power: 50W + 50W (Dual-channel stereo)
- Compatible Speaker Impedance: 4 Ohm, 6 Ohm, or 8 Ohm passive speakers
- Bluetooth Revision: Bluetooth 5.0
- Audio Input Layout: Pure Bluetooth 5.0 Wireless Input
- Audio Output Layout: Left and Right screw terminal blocks for passive speakers
Power to Output Scaling Matrix
To achieve maximum performance without thermal throttling or audio clipping, choose an appropriate power supply matching your speaker setup:
- 12V Power Supply: Produces up to 12W+12W (8 Ohm) or 20W+20W (4 Ohm)
- 15V Power Supply: Produces up to 20W+20W (8 Ohm) or 30W+30W (4 Ohm)
- 19V Power Supply: Produces up to 30W+30W (8 Ohm) or 40W+40W (4 Ohm)
- 24V Power Supply: Produces up to 40W+40W (8 Ohm) or 50W+50W (4 Ohm) — Requires an adapter rated for at least 5A or higher
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