Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker

Home Audio Bluetooth Receiver Amplifier Fosi Audio was founded with a simple goal: Build products that sound great and make people want to listen to music every day. We design, manufacture, and sell many Hi-Fi audio products on the market. We pursue your perfect music journey. Enjoy Hi-Fi music with Fosi Audio audio！ Instant setup with phones, tablets, and almost any other Bluetooth-enabled device. Bluetooth 5.0 chip ensures your devices maintain a strong, stable connection up to 50 Ft away for skip-free music. The High-Performance Texas Instruments TPA3116D2 Chip presents music with rousing highs and deep lows. Even at high volumes, there’s less than 0.04% harmonic distortion resulting in remarkable clarity. Fosi Audio BT20A’s curved edges and sleek controls accentuate its unibody design. With truly useful features, and thoughtfully designed premium enclosures. A new generation: exquisite design, improved operation. Perfect if you prefer separate passive speakers and preamps for your audio setup. 100 watt per channel power output can drive most home passive speakers to create astonishing Sound. Easy to fit your audio system with Bluetooth and RCA input With a built-in power protection circuit, there are no sparks flying when you plug the power adapter into the amplifier. Safe for use! Fosi Audio BT20A equip with an energy-efficient and stable power supply can get an astonishing sound. --About Bluetooth connectivity issue: 1. Ensure that all wiring is correct. 2. There is no signal interference nearby. 3. Try using a different power source and outlet. 4. If there are multiple input modes, check whether other input modes work properly. 5. Try using different Bluetooth devices, speaker wires, and speakers. 6. Change the environment. 7. If there is a Bluetooth antenna included, ensure that it is connected correctly and try using a different antenna. --About sound issues or not working properly: 1. Make sure all the cables are fully connected. 2. Adjust the treble and bass control of the power amplifier to achieve the right tone. 3. Please try to change the sound source and cables to test. --Only one channel has a sound or unbalanced output 1. Cross-check left & right speakers, speaker wires, and input cable eliminating either speaker or wiring. 2. Do not connect the speakers first->unplug the power cable-> do not turn off the amp power switch-> turn off the power switch at about 10S->plug the device in-> turn on the power, and connect the speakers to the defective channel. 3. If it has multiple input modes, try other modes to see if the issue persists. If multiple output modes, confirm if the other outputs are working properly.