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TDA2030, LM1875 Active 2.1-Speakers Microlab A6331 Circuit Diagram and PCB layout for Mod Hi-Fi Systems
Design set is made in a similar style, which will place the subwoofer, blending in with the speakers, even on the desktop. Speaker dimensions are relatively small and are 12 × 20 × 16 inches. The body is made of columns made of cardboard, wall thickness is 9 mm. You can use TDA2030 or LM1875 main chip power amplifier satellite and subwoofer. The pre-amp and low pass filter very popular op-amp TL072 or NE5532. You can replace with more low noise op-amp OPA series.