I don't know about the no sound/douk audio model. Probably built in the same room as the aiyima and fosi stuff. If you're running 4 ohms, the 48 volt supply is too much. If you're running 8 ohms, you can use it.
These little amps do a lot of power for the price. However, they are not mega power beasts. I ran my aiyima monoblock to a 12w3v1 and never bottomed out the sub, so expecting 300w continuous out of it is overly optimistic. 150 plus is more realistic. My old school Onkyo running 8 ohms per channel per dual coil git close to bottoming it, and it's rated at 125w per channel.
These little amps do a lot of power for the price. However, they are not mega power beasts. I ran my aiyima monoblock to a 12w3v1 and never bottomed out the sub, so expecting 300w continuous out of it is overly optimistic. 150 plus is more realistic. My old school Onkyo running 8 ohms per channel per dual coil git close to bottoming it, and it's rated at 125w per channel.
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