Well, my fiio amp just arrived 2 days ago and it was working fine until now. When I plug the amp to my sansa clip, and turned it on, no sound at all. Should I send it back for repair?

I have been surfing the web for headphones like the JVC HA-RX900 and the Koss KSC75, but I have come to a point where I think Canada is too limited from good products. Are there any websites or local stores that sells Headphones such as the JVC HA-RX900? Answers are much appreciated