STK428-640 HiFi Power Amplifier Board 200Wx2 Class D High Power Amplifier Module PWM CMOS Logic Level Audio Input

STK428-640 HiFi Power Amplifier Board 200Wx2 Class D High Power Amplifier Module PWM CMOS Logic Level Audio Input

Description:
- The STK428-640 model is a high-end product. Although it is a Class D circuit, it is carefully crafted according to traditional tuning style for Sanyo Class A and Class B circuits. The sound is warm and durable, with extensions for both low and high frequencies, maintaining the sound characteristics of thick modulus circuit for Sanyo and lacking the digital flavor of today's digital amplifiers. It can achieve 200W power per channel under a load of 4 ohms, with a distortion degree (THD) of only 0.8%. This model has many characteristics such as high efficiency, low heat generation, high power, and excellent sound effects, which can meet more than 99% of audio amplification needs.

- The STK428-640 module adopts for PWM CMOS logic level audio input method. This audio input mode can effectively reduce noise, distortion, and interference, greatly improving the clarity, dynamic range, and fidelity of audio, thereby bringing users a more outstanding auditory experience.

- This product is a pure back-end amplifier that can be used with front-end and other equipment according to needs. The back-end power is very strong, with a measured continuous output of 200W without distortion power, which is more powerful than TPA3255, IR2092 and other products on the market. It can easily drive large bookshelves and floor speakers, and has more than a few thousand watts of music power than the online nominal.

- It has been tested and does not require debugging. Simply add a transformer to produce sound. Old amplifiers, speaker modifications, luggage and other modifications can be made. With a real power of 200W and huge thrust, it is suitable for speaker modifications of 10 inches or above.

Highlights:
- The power supply adopts a high-power rectifier bridge and original three signal filtering capacitor for SAMXON, totaling 20000uF.
- Equipped with complete protection circuits for overcurrent, overload, etc.
- High current, wide frequency, high fidelity output inductance, special magnetic shielding structure, which can reduce noise.
- All aluminum alloy onboard radiator, integrated with finished board.
- Plug in card design.

Specification:
- Output power: 200W + 2200W at 4ohms; 130W + 130W at 8ohms
- Power supply voltage: AC dual 22V-36V
- Power amplifier type: class D thick-film
- THD: 0.8%
- Frequency response: 20Hz - 25kHz
- Amplification: 24X
- Static power consumption: 6W
- Input impedance: 10Kohms
- Input sensitivity: 0.9V
- Output impedance: 4 - 8ohms
- Product size: 110 x 50 x 140mm
- Net weight: about 420g

Package Included:
- 1 x Power Amplifier Board
- 1 x Input Shielding Cable
- 2 x Long Screws
- 4 x Copper Pillar Nuts