Hi all, After taking the plunge and recently forking out for a TW9300 I was pretty annoyed to find out that when it is fed with either a 4k source or 4k enhancement mode is on that it emits a very loud buzzing sound which is very audible during film watching or game playing. After playing about it seems that this only happens when the source is 60Hz, so I have managed to work around the problem with my connect media pc by changing the output to 50Hz. However I am stuck with running my ps4 at 1080p without 4k enhancement becausee of its fixed 60Hz output. I was also looking into buying a Panasonic DMPUB700 but after speaking to Panasonic on the phone today it seems there is no way of changing the output from 60Hz to 50Hz, so that's also out. I have emailed Epson and got a very patronising "it can be louder when 4k is on" response followed by a request for me to measure the output in dB to see if its within spec when I complained further. I know for a fact that not all models make this noise from demoing a couple in AV shops. The buzzing also occasionally stops for a while when switching modes, though doesn't last long, which suggests to me it is a fault or at least a bad design flaw. It all seems very similar to this thread here which didn't seem to overly resolve the issue: Question - TW9300. Loud noise with 4k material and enhancement? The supplier I got it from seems to think that sticking to feeding it 50 Hz is a fine solution, which doesn't overly help. The only other solution I can think of is building a hush box, which I am very reluctant to do. I have looked into frequency converters to change any 60Hz output to 50Hz but I get the impression these are expensive and can lead to image issues. Any advice on how to sort this would be greatly appreciated. I refuse to accept the fact that such a modern and premier AV product can only handle 50Hz. In the meantime I'm going to make a video of all these issues to put online, measure the dB level of the buzz and share this with Epson to see if they will take the issue more seriously.