1 Pair Based on Sugden A21 21W Pure Class A Single-Ended Audio Power Amplifier Board PCB Dual Channel

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Product Details: Based on the famous Sugden A21 pure class A amplifier circuit. 21W pure class A single-ended OTL power amplifier board 1 PCB is one channel Power supply voltage: AC35V*1(mono 150W) Output power: 21W Quiescent current: 800mA~1000mA Debugging method: Before power on, adjust the potentiometer clockwise to the end. After the power-on test sound is normal, turn it counterclockwise and adjust the voltage across the 1-ohm resistor to 800mV-1V. PCB size: 224*71MM Net weight: about 0.06KG (mono) Package list: 1 pair × Bare PCB

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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.

Step 3 If you\'re not sure of the correct size, you can click chat with us!

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1 Pair Based on Sugden A21 21W Pure Class A Single-Ended Audio Power Amplifier Board PCB Dual Channel
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