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ZK-TB21 Bluetooth 5.0 50W+50W+100W 2.1 Channel Subwoofer Amplifier Board TPA3116D2 HiFi Treble and Bass Control Stereo Digital Audio Amp Board for Home Theater DIY SpeakersTPA3116D2 HIFI chip solution: with AM interference suppression function, 2.1 channel stereo output 50W+50W+100W, to ensure continuous serial high-power operation, THD 0.1%. Using high-quality filter inductors, the sound is full and clear.Key features- TPA3116D2 HIFI chip solution: with AM interference suppression function, 2.1 channel stereo output 50W+50W+100W, to ensure continuous serial high-power- Bluetooth and AUX audio input: Bluetooth 5.0 version, higher transmission efficiency and longer distance. If your playback device does not have Bluetooth, you- Safety protection: The power amplifier board has overheat protection, reverse connection protection, circuit breaker protection, overvoltage and undervoltage- Features copper DC connectors and insulated terminals. It can withstand high current, does not generate heat, and does not damage the wire. The free DC head- Independent high and low bass control knobs, easy to adjust the volume, allowing you to experience theater-like sound effects. With its excellent performanceBenefits- Helps you get more done with consistent performance- Built to handle everyday use with confidence- Simple to integrate into your home or workspace- Designed to reduce hassle with straightforward operation- A dependable choice for long-term valueProduct detailsZK-TB21 Bluetooth 5.0 50W+50W+100W 2.1 Channel Subwoofer Amplifier Board TPA3116D2 HiFi Treble and Bass Control Stereo Digital Audio Amp Board for Home Theater DIY Speakers is built with a focus on practical design, stable performance, and reliable materials. It is engineered to support consistent results across common use cases, with thoughtful construction for durability. Use it as intended and follow basic care to keep performance strong over time.How to use- Unbox the product and check all included parts.- Follow the quick setup steps in the manual or app.- Connect power or pair the device as required.- Test basic operation and adjust settings to your preference.- Use regularly and keep it clean for best results.Ready to buyAdd ZK-TB21 Bluetooth 5.0 50W+50W+100W 2.1 Channel Subwoofer Amplifier Board TPA3116D2 HiFi Treble and Bass Control Stereo Digital Audio Amp Board for Home Theater DIY Speakers to your cart today and enjoy dependable quality, easy setup, and everyday performance you can trust.