Bakoon Products SCA-7500K Power Amplifier with Volume.

It is a product developed from AMP-KUMAMOTO. AMP-KUMAMOTO omits input buffers to reduce prices. Therefore, input impedance is low and 1kΩ. Modern CD players and music players have low output impedance, so there is no problem, but to connect those with vacuum tube output, the input impedance of 1kΩ may be too low. Instead, the speed at which there is no buffer is fast and there is only a delay time of 10 million seconds. However, due to requests for high input impedance products, the SCA-7500K was developed as a higher version of AMP-KUMAMOTO.

It was built at the origin of the Satri circuit SCA-7500K

This machine is suitable for the word "bargain." To reduce costs, following AMP-KUMAMOTO, should make a cheap price amplifier, but regroup the schematic over a whopping five times, change the PCB three times and commercialize, replace with the upgraded PCB again, etc Added consideration. High-performance J-FET is injected into the input stage, and high-end capacitors called OS-CON are injected in large quantities. If you actually calculate the number of parts, the more you approach the advanced machines. In addition, the SCA-7500K adopts a SATRI-IC-V9.3 of 14 transistors that ensures a wider band, stability, and accuracy. By ensuring 100kΩ, input impedance has become a very attractive model in terms of compatibility with vacuum tube amplifiers with high output impedance and improved drive power of speakers.

In AMP-KUMAMOTO, the power switch was put on until the bias adjustment was completed, and it took 5,6 minutes, but SCA-7500K put a bias turbo circuit, and the rise time is about 10 seconds
Since it is only RCA input, I think that it is an attractive model that can enjoy the overwhelming rebirth of the SATRI circuit by preamplifier etc. of your hand without being caught by SATRI link.
The same volume adjustment as other power amplifiers, so it is a great advantage to connect music players such as CD players directly and feel free to enjoy this as a primaine without preamplifier.
It has a full-scale headphone output, so it is good to enjoy music without worrying about late night.

*Bakoon ProductsThe logo and name will be changed to SCL (SATRI Circuit Laboratory). Thank you for your understanding.

What about the attenuator?

Metallic film resistance ATT has a very large amount of information, very good sound separation, rich medium to low range representation.
No-induction winding resistance ATT is a natural sound with minimal distortion, very high resolution, rich low range, no habit despite dynamic sound.

In the first song, Anne-Sophie Mutter plays. It is a good track to grasp the microdynamics of the violin. After the intense intro, a quiet and fine violin solo is progressed, but one of the static expressions that envelop the surrounding area is expressed without addition. When you close your eyes and listen, it is a tragedy of the song itself, and the lyrical feeling drifts. The quick response without waste is very impressive.
"You Look Good to Me" by the Oscar Peterson Trio. I was surprised at the long double bass passage in the beginning. Heavy and dark sound comes out. The fingertips move away and the baseline falls just below it. Natural and dynamic. The result of the brush rubbing the snare looks bright, and the piano located in the center is appealing with proper quantity and presence. The presence of the piano trio filled with the stage. There is no gap.
Finally, Diana Kraal's Temptation. I am surprised by the low-range punch power. The base that comes out strong. What is such a wide-range alternative? Speaking on vocals, you can admirably mix crawl-specific selflessness and sensuality. Gorgeous and beautiful again. The other solos that appear in the middle are as real as they are in front of you. When I close my eyes, a crawl stands in front of me. What would you do next if this entry class was created?