LC-KING headphone amplifier circuit

For audiophiles, having a fever is equivalent to burning money. For some audiophiles who are not very well-off financially, playing with headphones is a good way to create a fever that does not require too much money. The reason is very simple. Generally speaking, it is difficult to buy even low-quality audio equipment on the market for two to three hundred yuan, but you can buy a very good pair of fever headphones, and the frequency response and various indicators of the headphones are not inferior to high-end ones at all. Speaker unit, this is also the main reason why headphone amplifier DIY is popular at home and abroad. In headphone amplifiers, generally excellent discrete component circuits can be seen on domestic and foreign websites. There are also tube-made ones, but for ordinary enthusiasts That is to say, it is difficult to find components, and the matching of tubes is also a headache. The difficulty of making the main transformer with electron tubes has been solved. Here are some easy-to-make headphone amplifier circuits for reference by enthusiasts with better hands-on skills. The circuit diagrams come from domestic and foreign websites and electronic magazines. If it infringes your copyright, please notify me and I will delete it. LC-KING Class A (A) headphone amplifier circuit The above picture is a circuit diagram. The circuit is very simple. The preamplifier driver is NE5532 or other types of OPs. U2A is DC SERVER, which is used to stabilize the potential at the midpoint. The driver stage 2SD882 is NPN. Type power triode, this tube works in Class A state, so it generates a large amount of heat. The current flowing through R11 and R31 can be adjusted by changing its resistance. A radiator must be added to the triode during production.