2.0 Channel High Power Amplifier Board HiFi 500W+500W 3858 1494 Original Tubes Assembled

2.0 Channel High Power Amplifier Board HiFi 500W+500W 3858 1494 Original Tubes Assembled

Description:
This finished power amplifier board adopts famous circuit design, with high power, good sound quality and low distortion. All parameters of the amp board have been strictly tested. As long as the wiring is correct, the sound can be heard. No user debugging is required. The board comes with filter rectifier and heat sink. Just connect transformer and preamplifier. With proper matching, the sound quality of this amplifier is close to that of professional amplifiers.

Features:
- HiFi sound quality
- 8 Original tubes, including 3858 and 1494
- Size: 21.5 x 14.5 x 7.2cm
- Operating Voltage: Dual AC 24-36V; Recommended Voltage: Dual 30V or dual 32V
- Peak Output Power: 500W + 500W
- Distortion: 0.01%
- Four 10,000UF imported capacitors are connected in parallel to ensure sufficient current supply during large dynamics
- The power amp board with three ports
- Better load capacity. It fits ordinary home speakers
- High-frequency sound is slim and penetrating. Medium-frequency sound is sweet and natural. The low-frequency sound is full of vitality, but also full of flexibility and strength
- Designed with rectifier filter, and a large heat sink 21.6 x 14.3cm
- Adopt a rectifier bridge stack with a capacity of more than 15A, the power path is unobstructed
- High SNR and no noise
- Built-in speaker delay protection circuit. You will not hear the impact of power supply from your speakers
- LED Indicator: The LED is lit when it is working
- Dedicated audio tubes are used as driving tubes, ensuring HiFi sound quality

Package Included:
- 1 x Power Amplifier Board

Attention:
- The upper limit voltage of this board is AC dual 36V (that is, DC 50V). When a dual 30-32V transformer is used, the actual output voltage of which is about 35V.
- Electronic knowledge and manual operation ability are highly recommended.
- A premium power amplifier board needs a good preamplifier and a good transformer as support. It is recommended to use a 300W-500W ring-shaped transformer. If your transformer is not good enough, the sound quality will be greatly reduced.
- All connection points must be wrapped with adhesive tape before power-on. Please not power on when you are not sure whether your wiring is correct.
- The driving tubes are original ones for Hitachi, NEC, or made in Malaysia. Colors and shapes of tubes might be different due to different batch. Sometimes they are black package, and sometimes are green package. But the performance are the same. Buyers who have requirements of the appearance of the tubes, please contact us before purchasing.   
- Please note that the actual power of the board is 500W, although the circuit board is printed with 200W.  
- The input voltage of this amplifier board is alternating current, which is between AC dual 28V-dual 35V. Please choose your transformer strictly within this range.
- It is finished and ready to use.

Note: Other items pictured are not included in the package.

Wiring Diagram (For Reference Only):


This is the interface of power amp to power supply transformer. A dual-voltage transformer (three lines of output voltage) is used, in which the common ground terminal in the middle cannot be wrongly connected. After wiring, please check whether the wiring is firm and reliable.

Attention:
After each wire is connected, it must be wrapped with adhesive tape.

This socket is the power interface of the amplifier board, and AC dual voltage transformer is connected. If your transformer is dual 32V output, just connect it as shown in the figure below, the same is true for other voltages. Note that the middle 0 terminal (common ground) must be connected to the middle tap of the three wires of the transformer, and the wiring order on both sides is indiscriminate.


Audio Input Terminals:


Attention:
- After each wire is connected, it must be wrapped with adhesive tape.
- Wrong wiring and short-circuited connection are forbidden.

This output socket is connected to left and right speakers. The yellow and blue lines pictured are the positive poles (+) of the speakers. The red line is the negative pole (-) of the speakers, which is the common ground. After connecting the negative poles of the two speakers together, connect them to this point in the middle of the power amplifier board.