Audio Amplifier ZK-502L 2x50W with Volume Control & Bluetooth 5.0

The ZK-502L Bluetooth 5.0 Audio Amplifier Board delivers powerful stereo sound with up to 50W × 2 output, making it ideal for DIY audio projects, car systems, and portable speaker builds. Operating on 5V–24V, it supports a wide range of power sources and speaker configurations (4Ω–8Ω). With Bluetooth 5.0, it ensures fast, stable wireless connectivity and includes built-in protection features like overheat and short-circuit recovery. Its compact shell-less design makes it easy to integrate into custom enclosures.

Key Features:

• Output Power: 50W × 2 (at 24V, 4Ω)

• Bluetooth Version: 5.0, 15m range

• Voltage Range: 5V–24V (12V/24V recommended)

• Speaker Compatibility: 30W–200W, 4Ω–8Ω

• Protection: Overheat, short-circuit, reverse polarity

• Volume Control: Potentiometer with switch

• Compact Size: 55 × 38 × 17mm

Tip:

To have enough output power if the input is sufficient and the supply voltage/current is sufficient. The power supply voltage is higher and the relative power will be larger. The speakers with different impedances will have different output power. In the case of sufficient voltage and current, the larger the ohms of the horn, the smaller the relative sound power. Please pay attention!

Power supply voltage:

• 12V--8 ohm speaker/12W(left channel) + 12W(right channel), 4 ohm speaker/20W + 20W
• 15V--8 ohms/18 + 18W, 4 ohms/greater than 30 + 30W
• 19V--8 ohms/32 + 32W, 4 ohms/greater than 45 + 45W

• 24V--8 ohms/38 + 38W, 4 ohms/greater than 50 + 50W

Applications: DIY Bluetooth speakers, car audio systems, embedded sound modules, wireless sound upgrades.

• 1 x ZK-502L Audio Amplifier Board