Study/Copy PASS KRELL KSA100 Class A Power Amplifier HiFi Hi-END 150W*2 power amplifier | Электроника

Study/Copy PASS KRELL KSA100 Class A Power Amplifier HiFi Hi-END 150W*2 power amplifier | Электроника

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This machine adopts KRELL KSA100 original machine circuit structure

Product parameters:

Size: 430 wide X120 high X312 deep (all aluminum)

Machine weight: 19 kg

Output power: 150 watts X2 8 ohms 230 watts X2 4 ohms

Frequency response: 20Hz～20kHz 3Hz～150kHz

Total harmonic distortion: 0.05%

Signal to noise ratio: 110db

110V can be made to order, please contact customer service for special orders.

Native circuit architecture:

The entire circuit of KSA100MKII adopts a fully symmetrical push-pull circuit. The input stage is composed of Toshiba's high-quality low-noise fever pair tubes 2SA970 and 2SC2240 and precisely paired to form a complementary differential amplifier. This stage does not use constant current, which further reduces the noise. The second stage uses two pairs of IRF9160 and IRF960, which is also a differential amplifier. This stage uses a dedicated constant current tube LM334 of about 3ma for current. The driving stage is driven by the MJE15032/MJE15033 fever pair tube to drive three pairs of Anson Meijin sealed tubes. Parallel MJ15024/15025 for output, zero adjustment through VR midpoint, quiescent current adjustment

This machine adopts dual-channel, sub-board structure, each board is responsible for one channel, and the left and right are physically independent, which not only improves the separation of the whole machine, but also improves the signal-to-noise ratio. The power supply adopts 400W per channel. Breakpoint copper wire loop, and added delay soft start to realize soft start function, Japan Sanken 50A rectifier flat bridge, filter capacitor 60000UF per channel adopts ELNA FOR AUDIO, special filter capacitor for audio fever

ELNA FOR AUDIO dedicated capacitor

The power amplifier output tube uses three pairs of MJ15024/MJ15025 per channel for output