Hi,I have a pair of 8C's for about a year now and they sound fantastic. I did have one problem with one of my speakers it was outputting about 4-5dB less than the other one. I filled out the support form on-line explaining what the problem was along with the serial number and within 2 days they problem was resolved remotely. Each speaker has to be connected to the internet and you can leave them on all the time. Any other questions let me knowRich