NE5532 earphone amplifier ----- NE5532 Headphone Amplifier

NE5532 earphone amplifier, Ne5532 Headphone Amplifier Keywords: NE5532 made of headphone amplifier Headphone amplifier made by NE5532 Zhejiang Shenwei became a Headset listening to CD (VCD). I took more than 30 yuan and installed a high-fidelity headphone amplifier. NE5532 is generally used as a pre-placed, and it is very good. Now use as a small power amplifier, what is the effect? Rough watching circuit schematic, almost the same as the general op amp, but the resistance, the capacitance has a large change, the working state and the op amp are different. The experiment proves that the NE5532 is small power amplifier and has excellent performance. Beginners may wish to try. Be careful below during the test process: 1. Power filter capacitance C9 and C10 are used to cause self-excitement. When the front is placed, the C10 is sufficient, but it must be added to 470μF when the power is amplified. At the same time, the filter capacitor is directly related to the sound quality. 2, the resistance of R4 (R9) and R5 (R10) in the circuit should be repeatedly commissioned. R4 (R9) is typically 1kΩ in the preamplifier, while R5 (R10) is 100 kΩ so that its magnification can reach 100 times. But now makes a job, there will be self-excited, so R4 (r9) is modified with 8.2k, R5 (R10) to 33K, and the magnification is only 4 times, the circuit will not be self-excited, and the feedback is also appropriate, sound quality Soft, clear, high transparency. If R5 (R10) continues to 15K, the negative feedback is too deep, but not only the volume is light, the sound is dull, the reader can repeatedly debug, do perfect. 3, C2 (C6) is the side pathway of the input loop. Only 10μF in the front amplification circuit, when the power is amplified, the input impedance is too large, the signal is blocked, causing distortion or even self-excitement. C2 (c6) is now increased to 100μF, the sound quality is significantly improved, the sound area is wide, the treble is clear, the middle sound is pure, the bass is deep, rich. 4, the power supply can be selected in 3V ~ 15V. The four-section battery string can be connected to two-way (positive, negative 3V), and the volume is not much different from 12V, but the sound quality is not as good as 12V. It is recommended to use 9V to 12V better. In addition, the input ends r1 (r6) 51K because the volume is too large when listening to the headset, if the R1 (R6) can pick up 5 inches, before the case, the bed listening effect is also very good.

Our other product:

Professional lightning protection system for Tower	Professional FM Radio Station Equipment Package	FMUSER FU-1000C 1000W FM Transmitter With USB Audio Input Interface
FMUSER 200W FM Radio Broadcasting Package	Hotel IPTV Solution	FMUSER FSN-1000T V5.0 1KW FM Radio Broadcast Transmitter