I'm running my S7LN's at 3TH each 668Mhz and 35% fan for low noise operation.
Quieter than my R4. Best little heater since the S3. Wish they build a S9LN as good as those.
I'd buy one in a heartbeat if they decided to make one. Big issue for me is noise with these new miners, I missed out on the LNs unfortunately but I hope it's not just another one or two generation thing like the S2 and S4, it's looking like the 'S9LN' might just be the R4 though.