Arrived in 1 month. All working correctly. Recommend the seller.
Very happy with this. Sound quality is really good. I did a Power test on one channel, with a 600Hz sine wave, and 8 Ohm speaker. Power supply: 12V gave 7 Watts output power. 18V gave 17 Watts. 24V gave 30 Watts. 30V gave 46 Watts. 34V gave 62 Watts. For safety, I did not test at the max 36V now. But I did it before, and wrote 75 Watts. I did not test with a 4 Ohm speaker. In theory that would double the output power. Sounds very great with my bass guitar and a pre-amp. 7 Watt is already loud.