1 Pair E405 Gold Sealed Tube Pure Power Amplifier Board Class A High Power HiFi

Description

• Power supply: DC+-(35V-55V) recommended +-45V Note: Each board AC12V power supply is independently powered
• Power: 200 watts (total harmonic distortion THD+N<0.1%), DC+-45V, 4 ohms
• Class A 60W, measured under 4 ohm load
• Board size: 105*236MM
• Speaker impedance: 4-8 ohms

Parameters
1. Power supply: DC+-(35V-55V) recommended +-45V Note: Each board AC12V power supply is independently powered.
2. Power: 200 watts (total harmonic distortion THD+N<0.1%), DC+-45V, 4 ohms
3. Class A 60W, measured under 4 ohm load
4. Speaker impedance: 4-8 ohms.
5. Board size: 105*236MM.
6. Adjust the differential input stage current to 2MA: Adjust the VR1 (500R) adjustable resistor so that the voltage at C and D is 1.5-2V (that is, the voltage across the R9 (1K) resistor); the input differential current is 1.5- 2MA, this value is the best sound quality
7. The quiescent current of the large tube is 100MA: Adjust the adjustable resistance VR2 (1K) so that the voltage of the two points A and B is 22MV. At this time, the quiescent current I=22MV/0.22R resistance is 100MA; if the customer heat sink is large enough, it can make Increase the quiescent current, generally 100MA-300MA sound effect is best.
Package
1 pair E405 Gold Sealed Tube Pure Power Amplifier Board Class A High Power HIFI AMP

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