109 In stock
Finished PCBA Amplifier Board
IWISTAO HIFI Power Amplifier Finished Board 1 Pair 200W Golden Throttle A60 AC24VX2 ~ AC42VX2
Model No: WHFPA-A60
Golden Throttle A60 is a flagship amplifier of the generation. It has high and low frequency density, good control power, and excellent level of detail. The circuit is fully symmetrical and current feedback. The main feature of this circuit is the use of complementary push-pull circuits from the input stage to the output pole. It can easily obtain a conversion rate of hundreds of volts per microsecond, and the drive capacity for capacitive loads is quite good, and the sound quality is even better.
Fully symmetrical architecture and precise transistor pairing make the midpoint very stable from debugging. With the ON series high-power tube, the sound is bright and clear, the layered harmonic is very good, and the sense of festival is strong.
The circuit board has been equipped with a rectifier circuit, so you only need to connect the transformer, no need to add a rectifier board. Wiring installation is very convenient. Adjust the static current of the large tube to 100-300mA per tube, the board has a TEST point, test the voltage drop at the 2 end to 20-60MV.
Note: Remember to add the mica sheet when installing the large transistors. The mica sheet must be coated with thermal silica gel! ! !
1. Adopt Japanese 50A Sanken rectifier bridge
2. Circuit resistance comes standard with 718 resistance
3. Using Japanese Nikon KG or ELNA ADUIO as the main filter, the music taste is excellent.
4. The input transistors are Japan Toshiba HIFI tube 2SC2240 2SA970 with precision matching; Driver as the ON NJE15034 / 35, and the power pair transistors adopts ON NJW0281G / NJW0302G.
5. Japan Omron + UPC1237 protection circuit to ensure safe and reliable output and protect speakers
6. The midpoint servo circuit makes the output more stable without zero adjustment
1. Operating voltage: AC24VX2 ~ AC42VX2 plus AC12V (for protection circuit)
2. Output power: 200W (8 ohms), 300W (4 ohms)
3. Distortion: 0.002%
4. S / N ratio:> 100dB
5.PCB size: 195mm * 80 mm (excluding heat sink)
6. Qty: 1 pair
7. Weight: 0.8kg/Pair
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