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ZK-ST21 Bluetooth Amp Circuit Board

🔊 【 ZK-ST21 Bluetooth AMP Circuit Board 】 2.1 Channel | TPA3221 Pair | 100W + 100W + 200W High Power

🎧 Support Bluetooth 5.1 + AUX + USB Drive + Sound Card

📱 Control via Wuzhi Audio mobile app on both Android and iOS.

🎶 2.1 Channel Audio System: Left + Right + Subwoofer

💥 Two TI TPA3221 amplification chips. Sound sharp, powerful.

📦 Suitable for DIY and extension

2025/9/21 Edited to

... Read moreสำหรับผู้ที่สนใจแผงวงจรแอมป์ Bluetooth ZK-ST21 แบบ 2.1 แชนแนลนี้ ผมขอแบ่งปันสิ่งที่พบเมื่อทดลองใช้งานจริงครับ ZK-ST21 ใช้ชิปขยายเสียง TI TPA3221 คู่ ซึ่งทำให้กำลังขับสูงถึง 100W สำหรับลำโพงซ้าย-ขวา และ 200W สำหรับซับวูฟเฟอร์ เสียงที่ได้จึงทรงพลังและชัดเจน เหมาะสำหรับการประกอบเครื่องเสียง DIY หรือการติดตั้งในระบบลำโพงบลูทูธที่ต้องการคุณภาพเสียงระดับโปร ตัวแผงรองรับการเชื่อมต่อ Bluetooth 5.1 ที่เสถียรกว่าและระยะสัญญาณไกลขึ้น พร้อมพอร์ต AUX, USB Drive และการ์ดเสียงครบครัน รวมถึงการควบคุมผ่านแอป Wuzhi Audio ที่รองรับทั้ง Android และ iOS ทำให้ตั้งค่าและปรับเสียงได้ง่ายแม้ไม่เก่งด้านเทคนิค จากการใช้งานจริง ผมพบว่าแรงดันใช้งานของบอร์ดนี้อยู่ที่ 12-30V DC ซึ่งค่อนข้างยืดหยุ่น เหมาะกับแหล่งจ่ายไฟหลายรูปแบบ ลายวงจร PCB ทำออกมาได้เรียบร้อยและวางตำแหน่งอุปกรณ์ชัดเจน ช่วยให้การประกอบและดูแลรักษาง่ายขึ้น สำหรับคนที่กำลังมองหาแอมป์จิ๋ว สำหรับต่อขยายระบบเสียงแบบ 2.1 แชนแนลที่มีทั้งพลังเสียงและความสะดวกสบายในการใช้งาน ZK-ST21 ถือเป็นตัวเลือกที่คุ้มค่าและน่าสนใจมากครับ

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