STK490-310 / STK490-070 thick-film module – 60W×2 Hi-Fi amplifier finished board, a DIY upgrade surpassing the LM1875

Sanyo Semiconductor Co., Ltd. (a member company of ON Semiconductor) is a semiconductor manufacturing company with outstanding power supply device technologies, such as small package technology, energy-efficient switching technology, high-density packaging technology, etc., as well as world-class YI analog technology. Several analog-related assets include a wide range of process technology, analog design technology, skilled analog engineers, and specially designed and manufactured energy-saving and environmentally friendly devices, such as hybrid integrated circuits for inverters. Sanyo's core components include discrete circuits, general-purpose analog large-scale integrated circuits, ASSPs, and hybrid integrated circuits, which are widely used in a variety of products, such as personal computers, printers, cable TVs, mobile phones, audio-visual equipment, gaming equipment, car audio systems, and air conditioners.

This series of products are class H circuits powered by high and low voltages. Class H chip is powered by two sets of voltages of high voltage and low voltage, and automatically switches smoothly according to different output power. Class H power amplifier circuit is a relatively late product, and its design indicators put forward higher requirements for energy saving, signal to noise ratio, sound field and other indicators. This series of thick film chips not only have higher design and production parameters, but also have better hearing. This power amplifier can achieve satisfactory results by promoting general bookshelves or floor speakers.

This board is designed according to the concept of comparative fever, and the materials used are carefully selected. The power amplifier module can be installed horizontally or vertically, and it is easier to achieve multi-channel functions with a suitable radiator.

    Sound performance: The overall tone is warm, the sound is relatively soft, the treble extension is high but not harsh, the bass is deep enough and elastic, and it will not be mixed or sloppy. Sanyo thick film is a circuit between integrated and discrete power amplifiers. Fine workmanship and excellent craftsmanship are stronger than 3886,7294, and it is difficult for general DIY players to achieve this level.

Supply voltage:High voltage double 33-22 (AC), low voltage double 22-15 (AC) (can be shared) Under normal circumstances, the secondary needs 5-6 power lines

Output power: 60WX2@6 Ω THD 0.1%

Circuit board size: 140 * 85mm

Weight: 0.15KG

The finished board is guaranteed for 3 months.

STK490-070 finished board upgrade old power amplifier or active speakers are very good choices

Power supply voltage: AC dual 18V-26V

Output power: 40WX2@8 Ω THD 0.1% measured

Circuit board size: 140 * 82 * 42mm

Weight: about 180g

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

The finished board is guaranteed for 3 months.

Output terminal interface polarity sequence: left channel negative-positive, right channel positive-negative (near the relay terminal is positive)