ZK-TB21Q Bluetooth 5.1 Amplifier Board 2.1 Channel 50W*2+100W Mini Hi-Fi Audio Amp Supporting Qualcomm APTX-HD, AUX Lossless Input, Sub Amplifiers with Mic Input, DC 12-24V (ZK-TB21 Upgraded)

Upgraded Bluetooth Amplifier Board: 2.1 Channel 50Wx2 +100W Bluetooth 5.1 subwoofer audio amplifier, it supports connection to one subwoofer and two passive speakers (20-100W, 4-8Ω), Bluetooth+AUX audio input. Compared to the ZK-TB21, the ZK-TB21Q features more complex component integration and more mature technology, delivering a more refined sound experience. Hifi Amplifier and Ultimate Sound Experience: The ZK-TB21Q audio power amplifier module with original Texas Instruments TPA3116D2 chips, original Qualcomm module QCC3034, original TI operational amplifier NE5532 and high power digital amplifierdedicated inductor, significantly reduces distortion, sound effects are even more stunning, delivering a cinema-like audio experience. Bluetooth 5.1 & QCC3034 Module: Compared to the ZK-TB21, the ZK-TB21Q Upgraded Bluetooth version up to 5.1, achieved faster transmission and broader coverage, original Qualcomm QCC3034 module and PCM5102A, support transmission encoding SBC, AAC, APTX,APTX-LL, APTX-HD, with lossless transmission and decoding, it perfectly captures every dynamic nuance and detail of the audio. TREBLE & BASS ADJUST, CUSTOMIZABLE SOUND: ZK-TB21Q Bluetooth audio amplifier, equipped with dedicated bass and treble knobs, effortlessly switch between deep bass and crisp treble, customize sound effects for different scenarios, themes, and music genres to achieve optimal audio performance. Note: It is not recommended to set the amplifier volume to maximum, as this may cause distortion at the top end. Enjoy The Fun of DIY Speakers: ZK-TB21Q has a compact size and energy efficient and works with a broad voltage range, great for DIY audio project, such as building a battery-powered sound system and portable speaker setup. Supports multi-functional expansion with reserved microphone expansion ports, antenna connectors (for external antennas to extend Bluetooth range), and reserved button expansion wiring diagrams