The right side of my amp didn't make any sound. I did a check. As a result, the transistor of the right channel was damaged. I asked the seller that he would buy the right channel transistor and four 4302a transistors . The seller said that they would send the transistors free for only $10 shipping. However, he said he would just send two transistors for $10 shipping. There was no apology for a previous wrong answer. The actual shipping cost is 2-3 dollars. In the end, the price of the transistor was included in the shipping cost. It was a bad response.I just wanted to buy a well matched transistor. The packaging box of this product has a nasty smell. He used a ragged box that had been taped several times and didn't feel like new.
Very sweet sounding powerful power amp. Worth every cent. Highly recommended.