Thick-film STK4151/4191 universal module – hi-fi audiophile stereo DIY finished amplifier board

In the late 1980s and early 1990s, Sanyo's STK series thick film power amplifier modules appeared in a large number of Japanese combination audio on various brands of machines, attracting a large number of people who had just become wealthy.

The difference between the LM1875/3886 and STK series chips is that, in terms of technology, the LM series is small in size and easy to make, but the real and fake products are uneven; while the thick film chip is composed of multiple imported precision components, as well as sterling silver wire jumper integration (non-fool module), the internal use of very hot constant current circuits and paired high-power triodes; (not to mention the amateur situation, even if there is a certain scale of factories, it is difficult to obtain high-precision power amplifier triodes in batches under the current circumstances. At present, our domestic audio industry Due to these key components, it is still difficult to make a sound.

But on the market level, the two are different for DIY. LM1875 has a large playability space and a small space. In terms of tone, LM1875 is balanced and suitable for entry;In contrast, the thick tone is warmer and stronger; driven by the market, the LM series is more familiar with it at the entry level, while the obscure STK thick film is an unattainable dream in the eyes of the older generation of fans.

       This product is based on the most classic two modules, STK4151 */STK4191 *, which are also common modules in Japanese combined machines. This module accounts for a large proportion in the market, but DIY restrictions cannot be achieved. Under the requirements of many burners, this STK4 ** 1 general-purpose power amplifier board has been developed, which can be compatible with a variety of modules and is easy to use. It can be compatible with various modules by modifying some parameters according to requirements.
 

Basic parameters:

Model Number: PAM-STK41xx

Supply voltage: refer to the table below

Output power: refer to the table below

Frequency Response: 20-20kHz

Input Impedance: 56KΩ

Output impedance: 4-16Ω

Size: 70 x 170mm

Notes:

1, power supply voltage range

2, capacitor withstand voltage

3, module pin arrangement order

4, this product is a work in progress, does not contain thick film module, the default is equipped with all parameter components, can be welded according to different modules corresponding parameter components, parameter table refer to the following figure

5, this product is work in progress, not covered by warranty

 Parameter comparison table:

General model comparison table: