About our AIYIMA<br> Our design concept is to satisfy more audio enthusiasts' pursuit of sound quality.<br> The use of audio electronic products needs to be used in strict accordance with the correct connection and matching, so as to achieve the maximum use effect of the product.<br> We offer Brand technical support and service,any problem ,pls ask me!thank you ver much<br> Let you enjoy HIFI music! Thank you for your choice!<br> <b>Note:</b><br> When using a 32V or 36V power supply, the sound quality of the A07 amplifier will be better, the distortion rate will be low, and the service life will be longer, but the power can only reach the size of the voltage multiplied by the current. <br> For example, using our DC 32V 5A power supply, the power can only reach 160W. <br> If you want to reach the maximum power of 300W, you need to buy a power adapter that uses DC 48V and current is above 7A.(But the sound quality may not be as good as 32V or 36V)<br>