Use NE5532 to make high quality preamps ----- NE5532 Preamplifier

Use NE5532 to make high quality front, Ne5532 Preamplifier Keywords: use NE5532 to make high quality A power amplifier circuit is made with LM3886. When using school DVD machine, I always feel that the sound effect is not as good, and the loudness can not reach the nominal power effect. Although multiple adjustment circuit parameters (including lifting the power supply voltage), it has little effect. Later, I saw that the publication of the LM3886 is small, and there is a sufficient range of excitation signals to receive better results. To this end, the author selects a pre-amplified circuit plus a pre-amplification circuit to add a preamplifier input, audition, sound effect, and the loudness is significantly improved. The pre-discharge circuit of the production will be described below: Figure 1 shows the DC servo power supply circuit of the front discharge circuit, providing a stable ± 12V power supply to the front discharge circuit. The regulator circuit adopts a three-end integrated stabilizing block, and uses a NE5532 to constitute a servo circuit to realize real-time tracking and adjustment of the output voltage. Figure 2 is a front amplifying circuit, the circuit adopts "Yunxing Star" NE5532 constitutes the same phase proportional operation amplifying circuit, and the magnification of 5 times (mainly determined by R9, R7, R10, R8), C15, C16 in the circuit It has the effect of enhancing the high tone signal. The j1 junction-changing dual 12V output, J2 is the signal input, J3 is the signal output (connected to the input). Figure 3 is a printed circuit board diagram, Figure 4 is a component arrangement. This board can be mounted near the back surface when installing. Through the through hole, and passed through the J2 (dual signal socket). This circuit also applies to a combined system having a smaller amplitude amplitude as a pre-amplification of the amplifier.

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