Fosi Audio BT30D PRO Bluetooth Power Amplifier TPA3255 Channel Mini Class D Integrated Amplifier Stereo Audio Amplifier Suitable for Power Supply

【2.1 CH Amplifier】: The BT30D PRO power amplifier features two sets of passive speaker output terminals and one set of passive subwoofer output terminals. This allows for easy setup of 2.1 channel and other stereo HiFi audio systems. 【Superior Sound Quality and High Output】: The BT30D PRO features two high-quality Texas Instruments TPA3255 Class D amplifier chips, delivering a stable output of up to 165W x 2 + 350W of power while achieving a clear and pure sound free from distortion and clipping. The allure of deep bass: Gamers, moviegoers, and music enthusiasts will experience tight, smooth, and natural-sounding bass. There are two knobs for controlling the subwoofer: the SUB FREQ knob allows you to adjust the frequency of the passive subwoofer from 0 to 300 Hz, and the SUB VOL knob sets the volume of the subwoofer. 【Bluetooth 5.0】: The BT30D PRO Bluetooth amplifier has an automatic connection function; it automatically connects to your device when powered on. It offers stable connection stability with an effective range of 15m. 【Package Contents】BT30D Pro amplifier, 32V/5A power adapter, manual. 24-month warranty and prompt customer service are provided. Why does the circuit overload protection occur, causing the relay to disconnect the sound output and the fault indicator light to illuminate (red)? Reasons: ① The input device volume is set to maximum. ② A powerful signal source (professional sound card, amplifier preamp, etc.) is connected directly, exceeding the device's input impedance range. ③ Non-audio signals (DC power, powerful power lines, etc.) are connected to the audio input port. Also, use the included power adapter, ensure all interfaces are properly connected, and use in a stable voltage environment. Do not use in humid or dusty environments. [※] For better heat dissipation, we recommend using the Fosi Audio cooling fan with the amplifier. Why do the speakers stop working and produce no bass when I connect a subwoofer to a 2.1 channel system? Select a subwoofer with the correct impedance for your device and connect it to the corresponding port using a high-quality shielded cable. Always connect and disconnect cables with the equipment powered off. Adjust the subwoofer's volume knob to the appropriate position (e.g., minimum). The power on/off sequence is as follows: [Power On]: Amplifier → Subwoofer. [Power Off]: Subwoofer → Amplifier [※] For better heat dissipation, we recommend using a Fosi Audio cooling fan (sold separately) with the amplifier. Type: Bluetooth 2.1 CH Amplifier Maximum Output: 165W x 2 + 350W Input Method: Bluetooth + RCA Output: Passive/Active Speakers + Passive/Active Subwoofer Treble/Bass Control: Possible THD: ≤ 0.3% SNR: ≥ 85dB Termination Impedance: 2-8 Ohm Power Adapter: 32V/5A Operating Voltage: AC 110V - 240V Power Amplifier, Stereo Amplifier, Audio Amplifier, Bluetooth Amplifier, 2.1ch Amplifier, 2.1 Channel Amplifier, Compact Amplifier, Class D Amplifier, Integrated Amplifier, Bluetooth Amplifier, Black, Gift, Made in China, Class D Amplifier, Suitable for Bookshelf Speakers