You can use this circuit when your device is connected to a small power amplifier,
Suitable for audio small signal amplification,
10 times magnification (20db),
Can directly drive the headphones (not recommended to be with the power amplifier output);
Power supply: DC 9-19V( it is best to use linear power supply, switching power supply is easy to produce hum)
the amplifier chip is dual operational amplifier NE5532,
the input and output are 3.5mm ordinary headphone jack and RCA lotus jack.
Ольга П. –
Made very high quality, look just super! Appearance above all praise! The sound has not yet checked, I think there are also no problems.
Виктория Т. –
To St. Petersburg in 20 days. Everything works. Inside the chip NE5532, the price of which in the area of 80 rubles, the quality of gain is adequate price. This is still a preamplifier, so you should not expect a huge output power. On the power of 80% and above personally I have small distortion of sound. But if you need to swing a little signal-an excellent box!