<b>About our AIYIMA</b><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> Through your computer and other audio source input, choose our TUBE T3 as a tube preamp and match our A07 2 Channel Power amplifier, with your bookshelf passive speakers, this is undoubtedly a very perfect combination.<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>