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DC Servo Audio Power Amplifier Board NJW0281 NJW0302 2SA1930 2SC5171 250W Output MA-9S2
Description:
- Using original NJW0281 / NJW0302 and 2SA1930 / 2SC5171.
- Rings metal resistance, the main circuit employs a precision of ± 1% metal film resistors rings, ensure the good signal to noise ratio.
- 1.6mm thick sheet using double-sided PCB, 2.0 oz copper thickness
- The entire circuit board trace layout are very strict and reasonable, the overall PCB traces one-point grounding. The amplifier board is stable and reliable, high output power; beautiful mellow sound, open sound field. Dimensional sense of strong, low-frequency steady solid and strong, very good signal to noise ratio, wide dynamic range; details clear, excellent transient response, play a variety of music all rise to the occasion, at home playback environment has a very good performance.
Parameter:
- PCB Size: 83X167MM
- Supply voltage: DC DC dual 30-50V, recommend +/- 45V, 32V rectifier transformer double after + -45V
- Output power: 250 watts (total harmonic distortion THD + N <0.1%), DC + -50V, measured under 4 ohm load
Commissioning:
Adjust VR1 (1K precision adjustable resistor) causes the quiescent current about 100MA, VR1 counterclockwise static ;Current becomes large, clockwise decreases!
NOTICE: This is a semi-finished product.
Package list:
- 1 x Amplifier Board
