Using high-quality original parts, not only The safety quality is guaranteed, the service life is long, and more importantly, it is a strong guarantee that the actual performance can reach the design goal.
Pursuit Quality is our consistent aim. This board is designed with reference to the 4B circuit of Bai Shitong, the distortion is very low, the treble is clear and bright, and the bass is clear. Powerful, not loose, not sloppy.
The inter-stage coupling capacitor adopts two 47UF capacitors in series, the sound is natural and the sound field is wide
The resistor adopts five-ring metal resistor, and the main circuit adopts five-ring metal film resistor with an accuracy of ±1%, which ensures a good signal-to-noise ratio of the whole machine.
The wiring layout of the entire circuit board is quite rigorous and reasonable, and the overall PCB wiring adopts a one-point grounding method. The power amplifier board works stably and reliably, with large output power; the sound is beautiful and round, and the sound field is wide. Strong three-dimensional sense, stable and powerful low frequency, excellent signal-to-noise ratio, wide dynamic range.
Power parameters: DC+-55V (AC: transformer 400W dual 40V, need to add rectifier board)
Power: Class A and B 350W (Total Harmonic Distortion THD+N Less than 0.1%), DC+-55V 4 ohms, Class A 90W+90W 8 ohms
Class A 90W, measured under 8 ohm load
Speaker impedance: 4-8 ohms.
The quiescent current of the large tube is 100MA: adjust the adjustable resistor VR2 (1K) so that the voltage of A and B is 22MV, at this time the quiescent current I=22MV/0.22R resistance is 100MA; if the customer's heat sink is large enough, it can make Increase the static current, generally 100MA-300MA sound effect is the best.
size: 130 x 270MM
Material: plastic
colour: black
Package Contents:
2 x Audio Amplifier Board
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
Logistics information
Our products are located in Hong Kong, China, and the logistics speed depends on your specific location. According to our experience, it usually takes about 15-20 days of transportation time
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How to choose the correct size:
Step 1 Please measure your foot length carefully.
Step 2 Please choose the correct size according to your foot length and chinese size.
For example, If your foot length is 255 mm , you should choose the size 8.
