Hi all, I am experiencing frequent popping using the USB input of my Loxjie A40 that I purchased from Hi-fi Express a few months ago. I've tried my laptop USB output (with and without the USB driver from the Loxjie website), my TV USB output and iPad to USB output and they all have the same problem. I've purchased another Loxjie A40 from Amazon to test and it too had popping. I've emailed Hi-fi express and Loxjie themselves and I've received no response. I'm not sure what to do. Can anyone help?