product details:

KSA50 and KSA80 are praised as beautiful Krell power amplifiers by all walks of life. Among them, KSA50 is a Krell power amplifier, and it is also its own work (in terms of timbre). To this day, Nelson Pass, the designer of the American audio PASS and the founder of another audio Threshold, also said that the KSA50 circuit is better than the current 95% HI-END amplifier!

product details:

1. Use original Toshiba 2SA1943/2SC5200 and MJE15034/MJE15035.

2. The inter-stage coupling capacitor adopts WIMA capacitor 1UF, the sound is natural and the sound field is wide

3. High-precision cylindrical color ring chip resistors are used for the resistors, and the main circuit uses five-ring gold with an accuracy of ±1%

It is a membrane resistor, which ensures a good signal-to-noise ratio of the whole machine.

4. The PCB adopts a 1.6mm thick double-sided board and a 2.0 oz thick copper spray tinning process to ensure good passing performance of large and small currents. PCB quality.

5. This board is characterized by the use of advanced speaker protection circuit, which effectively eliminates the impact of turning on and off

Acoustic and DC output protection functions make your speakers safer.

6. The wiring layout of the whole circuit board is quite rigorous and reasonable, and the whole PCB wiring adopts one-point grounding method.

7. The power amplifier board is stable and reliable, with large output power; beautiful and round sound, and wide sound field. It has a strong stereo effect, stable and powerful low frequency, excellent signal-to-noise ratio, wide dynamic range; clear details, excellent transient response, and can play all kinds of music with ease. It has a very good performance in the home environment.

Input voltage: plus or minus 30V-50V DC, AC 12V-15V (a single group, two channels in two groups). It is recommended to use +-45V

Output power: Class A 50W+50W undistorted power, Class A and B is 250W+250W undistorted power output.

Output impedance: 4-8 ohms

The red light will be on after power on, and the green light will be on for 3-5 seconds when the circuit is normal.

PCB size: 280*64mm

The quiescent current is recommended to be 1.2A, and at this time, a radiator of 4 kg or more is required

JP6 JP7 is the quiescent current test point

package

2PCS YJ-KSA50 rear class A power amplifier board