SUQIYA-Clone Krell Ksa100 Mk2 Hifi Sound Audio Class A Push Pull Power Amplifier High Power 150w*2 8ohms Audiophile High End Amp

Product introduction:
1: This machine adopts KRELL KSA100 original circuit architecture. The board has been tested and improved for many times. The materials and workmanship can be seen in the picture!

2: The whole circuit of KSA100MKII adopts a fully symmetrical push-pull line. The input stage is a complementary differential amplifier composed of high-quality low-noise fever tubes 2SA970 and 2SC2240 from Toshiba, Japan, and they are precisely paired. This stage does not use constant current, which further reduces the noise. The second stage is also a differential amplifier composed of two pairs of IRF9160 and IRF960. This stage uses a special constant current tube LM334 of about 3ma as the current to improve the stability of the whole machine, A constant current source is added to improve the common mode rejection ratio and reduce distortion,!

3 : The excitation level adopts two pairs of Toshiba audio tube c5171/a1930 pairs and consists of Hitachi 669 to form a bias stable circuit. The entire voltage level circuit is fully balanced and symmetrical! The driving stage is driven by MJE15032/MJE15033 fever pair tube to drive three pairs of ON transistors in parallel with MJ15024/15025 for output. The working state of the whole machine is determined by the VR midpoint zero adjustment and static current adjustment. The driving force of the whole machine is very good. The actual listening is warm and delicate, and the music is flexible.

4: This machine adopts a dual channel, sub board structure. Each board bears one channel. Physically, it is completely independent from the left to the right, which not only improves the separation of the whole machine, but also improves the signal-to-noise ratio. The power supply is 400W non breakpoint copper wire ring cow per channel, and the delayed soft start is added to realize the soft start function. Japan Sanken 50A rectifier flat bridge, filter capacitor 60000 UF per channel, and special filter capacitor for audio fever, Provide the whole machine with abundant and pure power. In the audio equipment, especially the power amplifier, the power supply affects every note. It can be said that the power supply is the vital soul of the whole machine!

5: The horn protection circuit and the power board are designed together, which not only makes the installation beautiful, but also improves the separation and signal-to-noise ratio of the whole machine through simple installation and wiring, making the signal-to-noise ratio of the whole machine extremely high. The core component of the protection circuit is UPC1237, 16A Omron silver plated contact relay. The horn terminal is made of pure copper and gold plated input terminals, and the CMC of the United States is used. The material is very hot!

6: ELNA audio special capacitor, sound accurate, balanced, very clear, low frequency solid speed, medium frequency has a certain expressiveness, high frequency clear and bright.

7 : The power amplifier output tube uses three pairs of MJ15024/MJ15025 per channel for output. The driving force is very strong, and some speakers that are difficult to push can also cope with this machine!

Parameters:
Boundary dimension: 430 wide x 120 high x 312 deep mm
Weight: 20kg
Output power: 150 W * 2 8Ω 230 W * 2 4

Frequency response: 20Hz 20kHz 3Hz 150kHz
Total harmonic distortion: 0.05%
SNR:110db