BRZHIFI M4 Power Amp Board Finished 150W+150W w/ Power Tube For ON Semiconductor Referring To SF60

BRZHIFI M4 Power Amp Board Finished 150W+150W w/ Power Tube For ON Semiconductor Referring To SF60

Description:
The M4 circuit refers to the British SF60. Reproduce the infinitely engaging and intoxicating musical melody. Pure and natural sound quality is fully implemented in our circuit.

Its sound quality is obviously two levels higher than that for Audiolab 8000A, especially in the sense of layering and delicacy in the middle and high frequencies. The effect of this power amplifier is far better than those using NEC UPC2581V as the driving transistor. Especially the mid-frequency sound is much more comfortable. More importantly, the input op amp can be replaced to achieve the fun of timbre matching and upgrading! It can be adjusted to pure class A output! The product has over-current protection, delay protection and output DC protection to protect your expensive speakers.

Main cooling part is not included, please purchase separately.

Features:
- Materials used: double-sided gold PCB, MKS coupling capacitor for WIMA, military specification 718 copper pin resistor, relay for Omron, imported original transistor, capacitors for NCC. Rectifier bridge for Sanken
- Debugging: It is very simple to change the board to debug, only need to test the quiescent current of the output tube. Use the digital standard DC200MV voltage file, and the voltage at both ends of the TEST to be 10MV-40MV
- Upgrade plan: The default op amp are 2pcs TL072. You can buy higher-end dual op amps separately, such as MUS02, OPA2604, LME49720, etc.
- Upgradeable power amplifier board 150W + 150W
- Classic paired transistors. It also provides 150W output power
- MKS4 series capacitors have much more transparent sound quality and better vocals than small capacitors for WIMA
- The op amp is composed of buffer and first-stage voltage amplification, and the sound quality is naturally delicate and fuller, which is better than that of LM3886 and TDA7293. The op amp can also be upgraded to a high-end series for OPA and MUSES
- For Omron speaker protection circuit. With start-up delay, shutdown to prevent impact, DC protection and other functions, make your speaker work safe and reliable
- Adjustable resistance, choose to adjust the quiescent current with TEST point
- The copper pin of resistors is significantly more than that of general resistors, the same as that for DALE. The temperature of 25-50 ppm. Power: 1 / 4W. Accuracy: 1%, 5-color ring
- Oxygen-free copper A core transformer

Specifications:
- Power supply voltage: AC22X2 to AC36X2
- PCB size: 153 x 128mm/6 x 5"
- Output power: 150W+150W (4 ohms); 100W+100W (8 ohms)
- Power tube: NJW0281/NJW0302 for ON Semiconductor
- Frequency response: 10HZ-40KHZ
- Power tube for ON Semiconductor with good density and level

Package Included:
- 1 x Set of Power Amplifier Board

Note:
- The board is finished and ready to use.
- 2pcs 10000UF main capacitors are not included, please purchase separately.