The SCA-7511MK3 sold to a customer in the UK last month was making noise.Bakoon ProductsI sent it to him for examination. There were no abnormalities in the results. SATRI amplifiers are easily affected by inverter type fluorescent lights and variable type LEDs, and because the frequency band is extended, if noise is picked up from the input, it will be sent to the output. Also, in the case of a customer in the UK, we received an order for 220V, but the actual voltage used was 230V, so that may have had an influence.
This time, we reduced the noise level to 1/10 of the previous level by adopting a low-noise power supply for the pre-amplifier. Until now, when using this power supply, the noise would be reduced, but the voltage would also be lower, which would lower the output of the amplifier, so it could not be used in power amplifiers. This time, I was able to solve the problem for now by changing the circuit to prevent the output from decreasing.
I'm happy to be able to take care of all the details! I think this is something that major manufacturers cannot easily do.
