2.1-CH 60W Digital Audio Amplifier Board

2.1-CH 60W Digital Audio Amplifier Board (18W+18W+32W)

Its a fully assembled 2.1 channel 60W Amplifier board. It has an output for two 18W speakers by using the TDA2030A amplifier and one output for 32W Subwoofer by using TDA2050A amplifier. It needs to be powered up with the help of 120V to 12V AC Dual power Transformer and there is a rectifier circuit inside the board to convert from AC to DC. The TDA2030, TDA2050, and LM1875 can be completely interchanged. If all of them are replaced by TDA2050 or LM1875, need to replace the larger heat sink. The rectifier filter adopts two large 3300UF/25V electrolytic capacitors, which can provide enough low-ripple DC power supply to the whole circuit, and the sound can still be released freely when the dynamic output is large. The low-pass preamplifier circuit uses the NE5532 dual op-amp, and the audio coupling capacitor uses the original Philips CBB capacitor. The bass is powerful and flexible. Rectifier circuit uses SEP large 6A rectifier bridge to ensure that there is enough current output, maximize the power amplifier chip efficiency. This board is equipped with an MP3 decoder board audio input header (specification 3P-2.0mm) and a 12V regulated DC output header (2P-2.0mm) for powering the decoder board. The 12V power output from the board is used to power the decoder board. Do not connect the GND of the decoder board's audio input during wiring to reduce interference; if the decoder board alone supplies power, it must be connected to GND. This kind of power is very reasonable. It has Volume, Bass and Treble adjustment to meet the different hearing needs. When wiring, refer to wiring diagram, Do not short circuit or give high voltage input, Otherwise, it will damage the components. 

Specifications: 

• Input Voltage: 120V to 12V Stepped Down Dual Power Transformer (12-0-12)
• Output impedance: 4-16ohm
• Output Power: 12VDC and 1.5A
• PCB dimensions: 134x60mm.
• Net weight: 230g
• PCB Mounting hole: M4