Key benefits output flexibility: 100W+100W in dual channel mode or 200W in single channel mode for versatile audio setups. Reliable amplification: built around the Power amplifier chip TPA3221 for solid performance. Simple power compatibility: operates from 1030V DC with a 31V voltage limit; recommended to use a DC power supply. Clear integration: pure rear stage amplifier board intended for straightforward inclusion into audio builds. Consistent, straightforward design: focused on function and dependable operation for DIY and professional installations. Product details Power amplifier chip: TPA3221 Product model: 2001 Product name: 100W+100W dual channel/200W single channel pure rear stage amplifier board Adapted power supply: working voltage range 1030V DC, limit 31V; it is recommended to use a DC power supply Use scenarios Car audio upgrade: use in a 12V automotive power system to drive two speakers in a dualchannel configuration, delivering stronger, clearer sound. DIY home audio project: integrate as the rearstage amplifier in a custom stereo or multiroom setup, leveraging the dual or singlechannel options as needed. Subwoofer or dedicated channel build: employ the singlechannel 200W option for a power mono channel in a compact enclosure for a sub or main speaker channel in a DIY system.