AS21-II TPA3255 Bluetooth Amplifier, 2.1 Channel, 220W x 2 + 350W FM Radio, TWS, IR Remote, APP Control, 5-Knob Tuning, Frosted Cover, USB/AUX, Active Cooling, Protection, DC 16-38V, 10A Min

TPA3255 2.1 -Channel High-Power Bluetooth Amplifier Built around the TPA3255 chip, this bluetooth amplifier delivers up to 220W x 2 for left/right speakers plus 350W for a subwoofer, providing powerful output, clear detail, and deep bass for DIY 2.1 speaker systems, home audio projects, and custom sound setups. Frosted Protective Cover for a Cleaner DIY Build Unlike exposed amplifier boards, the AS21-II features a semi-transparent frosted cover that helps protect internal components from dust, scratches, and accidental contact while keeping the internal circuitry visible. The finished enclosure gives your DIY audio project a cleaner, more refined appearance.

5 Dedicated Knobs for Precise Sound Tuning This 2.1 -channel bluetooth amp provides independent controls for subwoofer frequency, subwoofer volume, treble, bass, and main volume. Quickly fine-tune your speakers and subwoofer directly from the front panel without repeatedly navigating menus or software settings. Bluetooth 5.1, FM, USB, AUX, IR Remote & TWS Stream music wirelessly through Bluetooth 5.1 or play audio from FM radio, USB drives, and AUX sources. Control playback using the included IR remote, app, or onboard controls. TWS pairing also supports two AS21-II amplifier boards for a wider wireless stereo setup; two units are required for TWS pairing.

IMPORTANT: DC 1638V / 10A Power Supply Required The AS21-II must be powered by a DC 1638V power supply rated for at least 10A. A power supply below the required voltage/current capacity may prevent the amplifier board from powering on or operating properly. The built-in cooling fan, over-voltage, under-voltage, over-heat, DC detection, short-circuit protection, and automatic recovery help support stable operation with compatible 38 speakers