SPECIFICATIONS

Features:
Multiple Protection with Frosted Acrylic Case: This Bluetooth amp module is designed with multiple protection mechanisms, include over-voltage protection, under-voltage protection, over-heat protection, short-circuit protection, reverse connection protection, with translucent frosted acrylic to protective it. Equipped with 6 shielded power inductors to suppress electromagnetic interference (EMI) and enhance system stability. Besides, there is a 50 * 25 * 10 mm cooling fin above audio chips, used to reduce the dissipate heat for amplifier chips, reduce temperature rise and its impact on sound quality, and ensure long-term stable working of the components.
- 2.1 Channel Subwoofer Audio Amplifier Board: This SZM-TB21H upgraded power amplifier is 2.1channel, allows you to connect 2 passive speakers and drive a subwoofer. The upgraded TB21 adds three XH2.54-3P terminals, namely the Power Amplifier Input Interface, Microphone Preamp Reverb Send Interface and Microphone Preamp Reverb Return Interface. And it comes with Treble and Bass buttons, independent subwoofer volume adjustment buttons and 20 - 200Hz subwoofer frequency adjustment buttons, which is very friendly for audiophile, you can adjust the Treble and Bass buttons, make the bass more shocking and the treble clearer, make the sound more layered.
High Definition HIFI Stereo sound effect: The TB21 power amplifier board built in two TPA3116D2 power amplifier chips, TPA3116D2 is a high performance class D power amplifier chip, can make the device maintain ultra low distortion in the whole audio frequency band and show high resolution audio at the same time. The wiring around the chip is an window tin spraying design to increase the output power. 4 x Low noise preamplifier 5532 group can improve the sound quality and volume, increase the gain.
50W * 2 + 100W High Power Output: This TB21 audio amplifier has a maximum output power of 50W for the left and right channels respectively, and a maximum output power of 100W for the subwoofer. It can drive two high-power speakers (20 - 200W, 4-8 ohms) and one subwoofer (20 - 100W), and the adapted power supply is DC12 - 24V / 5A or above. The higher the power supply voltage/current, the higher the output power, and the lower the speaker resistance, the higher the output power. The power adapter power must be higher than the actual working power of the amplifier.
Multiple Audio Input Modes: This Mini amplifier receiver built-in Bluetooth 5.0 and 3.5mm AUX Input. Bluetooth 5.0 mode, faster transmission speed, lossless decoding, lower distortion rate, connection distance to audio equipment is 10m/33ft. Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected.

Place of Application: - Widely used in Car Audio System, DIY Speakers, store solicitation, home theater, square speakers, etc.