1. TPA3221 Pure Power Amplifier Board, One-Click Bridging 2. Mcu Intelligent Anti- Sound, 3. Bridge 200W 4. Dual Channel 100W+100W 5. Input Anti-Reverse Connection 1. Product name: 100W+100W dual channel/200W mono pure power amplifier board 2. Power amplifier chip: TPA3221 3. Product model: -2001 4. Adaptable power supply: Working voltage range 10-30VDC, limit 31V. It is recommended to use a DC power supply with a voltage of 24-30V and a current of more than 10A. The higher the voltage, the greater the output power. Never connect to alternating current, otherwise it burn out! 5. Adaptable speakers: 3-8 Ω in BTL dual-channel mode, 20-100W; 2-8 Ω in PBTL mono mode, 50-200W 6.Heat dissipation method: multi-tooth heat sink 7. Gain selection: No. 2 dial switch 2-level selection, 28dB, 38dB 8. Bridge connection method: Turn off the power first, turn the dial switch to the ON position, short-circuit R+ L+ at the output terminal for parallel output, and short-circuit R-L- for parallel output. 9. Maximum power: In BTL mode, 2 x 70W@24V 4Ω, 2 x 100W@30V4Ω; in PBTL mode, 150W@30V 2Ω, 200W@30V2Ω, 110W@30V 4Ω 10. Protection mechanism: Input under-voltage, overheating, over-current, short-circuit protection, input anti-reverse protection Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:As Shown Material:PCB Package Contents: 2 x Digital Power Amplifier Board Module (Including Heat Sink) 2 x 3P Double-Ended Shielded Wire Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.