Bass strong, strong, clear and crisp. Using the chip for the new original: the default bass unit for the 1 TDA2030-- output peak of 30W, the dual channel unit for the 2 TDA2030-- output peak of 18W+18W. LM1875, TDA2030 can be completely interchangeable, if all replaced by LM1875, please change the radiator. The power amplifier chip has five pins: positive, negative, forward, reverse, and output. Chip heat sink and a cathode connected through electric work when the heat dissipation of the chip never and ground short circuit, or immediately burned out.
Left and right channels: TDA2030Ax2, peak power: 18Wx2, recommended by the 2.5-4 inch, 4-8Ω 10-30W full frequency speaker.
Bass output: TDA2030Ax1, peak power: 30W, recommended with 5-8 inch, 4-8Ω 30-50W bass speaker.
Working power supply: Dual AC9-15V transformer, recommended for the use of dual AC12V power of more than 30W of the transformer.
Output power: DC12V 1.5A, power supply to the 12V decoder board.
PCB material: FR-4 glass fiber board,
PCB size: motherboard 80x65mm, tone board 80x20mm. Potentiometer shaft center distance: 28mm, shaft diameter: 6MM. Net weight: 130g. All elements of the new, rectifier and filter by two large 4700UF/25V electrolytic capacitor, to the whole circuit to provide adequate low ripple DC power supply, high dynamic output voice still freely retractable.
Please you don't superstitious filter capacitor, the bigger the better, sometimes too large but suitable for the counter or the occupied space, the knowledge on the net a lot of, baidu knew. Lowpass pre amplification circuit adopts double the original Texas ne5532 amplifier, audio coupling capacitor use monolithic capacitor, powerful bass elastic. Rectifier circuit selection full wave rectifier, to ensure that there is enough current output, to maximize the efficiency.