ZK-AS21 TPA3255 Bluetooth 5.1 Power Amplifier Board HiFi 2.1 Channel 220Wx2+350W Digital Audio Receiver AMP Board with Treble and Bass Control for DIY Speakers

Name: 2.1 channel BT power amplifier Channel: 2.1 channel (left channel+ right channel+subwoofer) BT Version: 5.1 Model:ZK-AS21 Audio input: BT+AUX+USB+USB sound card(dial wheel key to switch mode and song) Chip Solution:TPA3255 Adaptive power supply: DC16~38V, ≥10A Output power: R&L channel≤220W subwoofer≤350W Voltage gain:30dB Size:141*132*26mm Adaptive speaker: L&R channels30-220W,3-8Ω subwoofer 30-350W, 2-8Ω Protection Mechanism: Protection against reverse connec- tion,undervoltage,overheating, overcurrent and short circuit (automatic recovery without restart) KIND TIPS： When the audio signal input is large enough and the power supply voltage/current is large enough, there will be enough output power! The higher the power supply voltage, the greater the output power, and the smaller the speaker impedance, the greater the output power! Please make sure that the power of the adapted power supply is greater than the actual working power of the power amplifier! Packing Include: ZK-AS21 Power Amplifier Board * 1 Protective Shell * 1 Set Screwdriver * 1 Knob * 5

• 【HI-FI & Stereo】High-quality 2.1-channel 220W+220W+350W Bluetooth 5.1 amplifier board, with multiple audio input methods such as AUX, Bluetooth, U disk, and USB sound card, allowing you to enjoy the fun of music anytime, anywhere.
• 【Function upgrade】Supports APP control, and can modify Bluetooth name and password settings. The 5.1 Bluetooth version has settings such as adjustable volume, sound on/off, and timed shutdown. Comes with 10 natural sleep songs and up to 1023 sound combinations. Not only can you display the playlist of the U disk, you can also shake the phone to change songs or use the dial/mode key to switch songs.
• 【Professional chip】Using 2 Texas Instruments TPA3255 chips, it is a high-performance Class D amplifier with Class D efficiency, which can bring true high-end sound quality. The device adopts advanced integrated feedback design and proprietary high-speed gate driver error correction technology. This technology enables the device to maintain ultra-low distortion across the entire audio band while providing high-definition sound quality.
• 【Super Compatibility】 5.1 Bluetooth version, with higher transmission efficiency, more stability and longer transmission distance. In open space, the wireless range can reach 15 meters (49 feet). It can be widely used in various devices such as tablets, PCs, TVs, smartphones, laptops, etc.
• 【Safety Protection】 The amplifier board has short circuit, overcurrent, overheating and anti-static protection to prevent complete failure. When overloaded, the device will report the fault to the processor to protect itself from damage.