Thank you for replying.
I have another question. I am in the process of purchasing a Cayin HA300MK2 amplifier and when talking to Musicteck in the USA he stated that Cayin has recently changed its transformer to decrease the possibility of noise. He had an open box MK2 version in stock (silver color), but he stated that it did not have the latest transformer and that he would have to change the transformer to get it to be equivalent to the latest version. Alternatively, he stated that I could order a new black version of the MK2, which would then be shipped from China and it would automatically have the new transformer.
Could you please explain when Cayin decided to change the transformer and why it was necessary?
My second question. What is the present-day availability of the Cayin HA300MK2 headphone amplifier? I placed a special order with a Cayin-authorised dealer in the USA in early October, and I have not received any information on when it is likely to he shipped to the US Distributor from China.