• YJ E405 Amplifier Board MJ15024G/MJ15025G 200W+200W 4ohm 2SA1930/2SC5171
  • YJ E405 Amplifier Board MJ15024G/MJ15025G 200W+200W 4ohm 2SA1930/2SC5171
  • YJ E405 Amplifier Board MJ15024G/MJ15025G 200W+200W 4ohm 2SA1930/2SC5171
  • YJ E405 Amplifier Board MJ15024G/MJ15025G 200W+200W 4ohm 2SA1930/2SC5171

YJ E405 Amplifier Board MJ15024G/MJ15025G 200W+200W 4ohm 2SA1930/2SC5171

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  • Price:$100.39
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YJ E405 Amplifier Board MJ15024G/MJ15025G 200W+200W 4ohm 2SA1930/2SC5171

Description:

This line refers to the pure post-class of E406, with DC servo circuit (acted by OP07 with extremely low noise). Omron relay +C1237 horn protects your speakers; increase the output overload over-current protection.

E405 sound characteristics: natural and slender, wide voice, great dynamic effect is very good, the biggest feature is the bass deep dive.

Product Details:

- Using the original ON Semiconductor MJ15024G/MJ15025G and Toshiba 2SA1930/2SC5171.
- Stage coupling capacitor uses WIMA top capacitor 1UF for natural sound, wide sound field
- The resistor uses a five-ring metal resistor, and the main loop uses a five-ring metal film resistor with an accuracy of ±1% to ensure a good signal-to-noise ratio.
- PCB adopts 1.6mm thick double-sided plate, 2.0oz copper thickness, spray tin process to ensure good current performance. First-class PCB quality.
- Use the current advanced C1237 BTL speaker protection circuit to effectively eliminate the impact of opening and shutting down. DC output protection function makes your speaker more secure.
- The layout of the entire circuit board is very rigorous and reasonable, and the overall PCB trace uses a point grounding method. The power amplifier board is stable and reliable, and has a large output power; the sound is mellow and the sound field is open. Strong sense of three-dimensional, low-frequency solid and powerful, signal-to-noise ratio is very good, wide dynamic range; clear details, excellent transient response, playing all kinds of music to cope with, in the family's playback environment has a very good performance.

Parameters:
- Power Supply: DC+- (35V-55V) recommended +-45V
   Note: each panel AC12V power supply independently.
- Power: 200 W (total harmonic distortion THD+N<0.1%), DC+-45V, 4Ω
- Class A 60W, measured under 4Ωload
- Horn Impedance: 4-8 Ω
- Plate Size: 105 x 236mm
- First adjust the differential input stage current to 2MA: adjust VR1 (500R) adjustable resistance to make C, D two point voltage to1.5-2V (that is, the R9 (1K) resistance voltage at both ends); at this time the input differential current is 1.5-2MA, this value will make the best sound quality.
- Tube static current is 100MA: adjustable resistance VR2 (1K) to make A and B two points voltage 22MV, at this time the static current I=22MV/0.22R resistance is 100MA; if the customer heat sink is large enough, the static current can be increased, and the general 100MA-300MA sound effect is the best.

Package Included:
- 2 x Amplifier Boards

Adjustment Operations:

First adjust differential input stage current to 2MA: adjust 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. The sound quality of this value is the best.

The static current of the large tube is 100MA: Adjust the adjustable resistor VR2 (1K) so that the voltage at A and B is 22MV. At this time, the static current I = 22MV / 0.22R resistance = 100MA. If users' heat sink is large enough, it can increase quiescent current. Generally, the sound effect is best when it is 100MA-300MA.




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