Specification:
Product Name: 2.1 Channel Bluetooth Audio Power Amplifier Board
Model: YS‑TB21
Channels: 2.1 (Left / Right / Subwoofer)
Total Output Power: 200W (Left ≤50W + Right ≤50W + Subwoofer ≤100W)
Input Modes: Bluetooth + AUX 3.5mm audio input
Input Sensitivity: 500mV
Power Supply: DC 12–24V, 5A and above
Speaker Compatibility: 10–200W, 2–8 Ω speakers
Protection: OVP / UVP / OTP / SCP multi‑protection circuit
Main Controls: Master volume, L/R bass, L/R treble, subwoofer volume, subwoofer frequency
Extra Interface: Mic expansion connector
Core Components: Large‑capacity energy‑storage capacitor, fully shielded inductors, integrated heat sink

Features:
1. High‑power 2.1‑channel Hi‑Fi output: 50W+50W stereo plus 100W subwoofer channel for strong, immersive sound.2. Comprehensive tone control panel: Independent knobs for master volume, treble, bass, sub level and sub frequency for precise system tuning.3. Dual audio input: Seamless switching between Bluetooth and AUX input to match phones, tablets, PCs and players.4. Enhanced power design: Oversized capacitor and shielded inductors provide stable power with reduced noise and heat.5. Built-in multiple protections: overvoltage, undervoltage, overtemperature and short circuit protection, fully ensuring the safety of the amplifier and speakers.6. Compact upgrade layout: Slim board, integrated terminals and mic expansion connector, easy to install in DIY speakers, home theater or KTV systems.

Package Includes:
1 x YS‑TB21 2.1 Channel Amplifier Board