300W Low-Distortion Classic STK High-Power High-Fidelity Thick-Film Amplifier Board – STK496-430, DIY Finished Board.

     basic parameters

STK496-430 power 150W + 150W 6Ω working voltage, AC dual 33-35V

STK496-090 Power 100W + 100W 6Ω working voltage, AC dual 24-35V

STK407-050 Power 60W + 60W 6Ω working voltage, AC double 22-28V

All STK series chips are compatible with 4-8 ohm speaker complexes

Sanyo STK is commonly known as Sanyo Thick Film. Under the control of the tuned sound and high-precision semiconductor process production process, it is not the level that ordinary amateur DIY players can achieve. In addition to better sound field and resolution, the low-frequency strength is much stronger, which is completely the difference between professional athletes and ordinary players! These thick film circuits have always been customized products for big brand audio manufacturers. In the early days, many famous factories used them to manufacture power amplifiers, such as K + H, Sony Sony, Panasonic PANSONIC, KENWOOD, JEVIS JVC, Shanshui SANSUI, Sharp SHARP, Pioneer PIONEER, Aihua AIWA, etc. Almost all Japanese audio manufacturers use them, and they have been used for more than 20 years, which has influenced a whole generation. It is also a sound with a strong era brand that our entire generation heard when they were young. It always sounds unforgettable. Sanyo, a company specializing in the production of power amplifier modules, was later acquired by ON Semiconductor of the United States. After the acquisition, it integrated Sanyo's traditional craftsmanship, coupled with ON's unique design, and the later products were even more outstanding. They are still used by large companies in the United States, such as BOSE and Genelec in Europe!  

Fortunately, I came across a batch of new inventory of the power amplifier module STK496-090 produced by Sanyo SANYO in the later stage, which is a more classic sound of the old Sanyo. Unfortunately, in the later stage, coinciding with the vigorous development of the Internet and the large-scale popularity of various portable devices (especially large-screen touch-screen mobile phones), many people gradually forgot these high-performance desktop devices. Those once famous audio manufacturers had to change their product direction, making these customized products dusty in the original SANYO packaging factory warehouse in the Philippines, staying for more than ten years.

After getting the test, it is found that this module still has relatively large potential. According to the circuit test provided by the official, the sound is medium. Under the recommended working voltage AC double 35V voltage, its output power is 150WX2@6 Ω (THD = 0.05%) The recommended working voltage is DC plus or minus 45V, and the maximum working voltage should not exceed plus or minus 49V. (According to the data provided by the official)

DIY is very simple, the whole board has been tested, no need to debug; DIY, upgrading and modifying speakers are all good choices.

Power supply voltage: AC dual 33-35V

Output power: STK496-430 150W6Ω (measured real power)

Size: 116 * 73mm

Accessories: Copper pillar nut * 4, screw * 2, three-core shielded cable * 1

    Note: The filter capacitor defaults to 50V withstand voltage, and the capacitor needs to be replaced if it is higher than 50V power supply.

The finished board is tested and shipped, non-human damage, and the warranty is 3 months.

    DIY is very simple, the whole board has been tested, no need to debug; DIY, upgrading and modifying speakers are all good choices.

Supply voltage:STK496-090   AC Dual 24-35V

                      STK407-050   AC Dual 22-28V

Output power: STK496-090 100W6Ω (measured undistorted power)

                     STK407-050   60W6Ω

Dimensions:STK496-090   116*83mm

                     STK407-050   135*65mm

Weight: about 180g

Accessories: Copper pillar nut * 4, screw * 2, three-core shielded cable * 1

The finished board is tested and shipped, non-human damage, and the warranty is 3 months.

The picture below shows the STK407-050 finished board.