Hi,
I'm new to this forum and this is my first ever post so please be nice 
I currently have a set of Harman Kardon Soundsticks III for my desktop and a friend of mine recently bought me a Fiio E7+E9 amp combo for my birthday to use with my Beyerdynamic DT770 Pros.
I was wondering if it would be safe to connect the E7+E9 to my computer with the USB and then connect the Soundsticks III to the 'Stereo sound source Output' of the E9 with the jack coming from the Soundstick's subwoofer???
This is the first amp I have ever had so I want to make sure that it won't damage my desktop speakers 
Thanks for your help guys.






