Looking for superior sound quality in a compact form? The ZK-502C Class D digital amplifier board delivers powerful, clear, and round sound with a THD as low as 0.1%, even during long periods of high output. Supporting both Bluetooth 5.0 and 3.5mm AUX input, this dual-channel bluetooth amplifier board is perfect for driving 4Ω–8Ω passive speakers in your DIY audio projects. This digital audio amplifier ensures a premium listening experience for any mini hifi amplifier setup. Key Features Bluetooth 5.0 and 3.5mm AUX input for flexible audio sources in your bluetooth amplifier board 50W x 2 high-power stereo output (supports 30W–200W speakers) for a digital audio amplifier Wide input voltage: DC 5V–27V (5.5×2.1mm jack) compatible with your mini hifi amplifier Onboard power switch and volume control with LED indicator for the stereo receiver Built-in protection: overvoltage, undervoltage, overheating, short circuit, and DC detection in this digital audio amplifier HIFI sound quality with low distortion, even at high volume on this bluetooth amplifier board Input & Output Ports Input: Bluetooth 5.0 / 3.5mm AUX jack for the digital audio amplifier Output: Left and Right Speaker Terminals (R+, R−, L+, L−) on the mini hifi amplifier Power Input: DC 5–27V (center-positive plug) for your stereo receiver project Technical Specifications Parameter Description Output Power 50W × 2 (max) stereo receiver Audio Input AUX + Bluetooth 5.0 amplifier Compatible Speakers 4Ω–8Ω, 30W–200W speakers Bluetooth Range Up to 15 meters for bluetooth amplifier board Protection Features Overvoltage, undervoltage, thermal, short-circuit, DC detection Example Power Output at Various Voltages: 12V: 4Ω/20W×2, 8Ω/12W×2 digital audio amplifier 15V: 4Ω/>30W×2, 8Ω/18W×2 stereo receiver power 19V: 4Ω/>45W×2, 8Ω/32W×2 mini hifi amplifier use 24V: 4Ω/>55W×2, 8Ω/38W×2 bluetooth amplifier board Package Includes: 1× ZK-502C Bluetooth Amplifier Board 2× Acrylic Protective Panels for your digital audio amplifier 1× Screwdriver for mini hifi amplifier assembly 1× Heat Sink for the stereo receiver 1× 20cm Power Wire for the digital audio amplifier 1× Volume Knob for the bluetooth amplifier board 1× Accessory Kit for mini hifi amplifier Ideal For: Raspberry Pi audio projects with a bluetooth amplifier board DIY Bluetooth speaker systems using a digital audio amplifier Home stereo upgrades with a mini hifi amplifier Compact wireless audio setups with this stereo receiver
