PCB size is about 199x66mm,
Supply voltage: single AC12V, current above 500mA
Magnification: 1:1 (that is, without magnification)
Signal-to-noise ratio: 95DB
Input and output interface: RCA
Power input interface socket: 5.5-2.1MM
Introduction to X-10D Circuit
In the mid-1990s, a well-known British Musical Fidelity company launched a tube buffer stage called X10-D. Its excellent effect once caused quite a stir in the market. It was installed in a unique barrel-shaped casing in Hong Kong. Audiophiles call it "Little Piglet". When it is used between digital audio sources such as CD/VCD/DVD/MP3 and the power amplifier, the annoying digital taste in long-term listening will disappear immediately, and the entire listening system will be lost. There is a sweet and delicate gallbladder taste. This gallbladder buffer can be used for the integrated board of the front and rear stages, including the toned board, which can easily realize the matching of the front and the back of the gallbladder.
In the circuit, the classic triode amplifier circuit is used, and it works in a class A state with good listening experience. The whole circuit has no gain, that is, a buffer stage. The circuit cleverly uses a deep negative feedback circuit at the output end, and the distortion of the circuit reaches It has achieved amazing indicators, reaching 0.008%, while the frequency response has reached 10HZ-100KHZ, and the output impedance has dropped to 200 ohms.
Based on the above circuit as a blueprint, we have designed and developed this amplifier buffer. The design is simple and practical, the tone is warm, and it is perfect for listening to human voices. The amplifier can work only with an AC12V, which is very convenient.
BOM for PCB:
Resistors: 33Ωx2, 330Ωx3, 1Kx2, 1K5x2, 4K7x2, 6K8x2, 8K2x2, 10Kx2, 56Kx2, 470Kx4, 1Mx4, 1M8x2, 2Ω2/3Wx1
Capacitor: 220Px2, 0.22uFx4, 2.2uFx2, 10uFx2, 470uFx2, 1000uFx8
Transistors: IN4007x6, LEDx2, SS8050x2, SS8550x2
9-pin header for PCB x2
4-bit RCA socket x1
DC power socket x1
