Originally Posted by DTV TiVo Dealer
I have worked very closely on the buzz issue and have a few remarks to help clarify the issue.
First, the buzz is almost identical from panel to panel, assuming we are comparing same models/sizes/generations. So changing a 5020 for another 5020 will yield little too no difference. Some may report a different buzz and I would respond that if the panels are not placed exactly in the same position and the seating is not exactly the same you can't accurately compare the panels buzz.
Second, Very few people can even hear the buzz. That's because most of us we lose our ability to hear the oscillating frequency at about 30 yrs old. For example, I have enjoyed and been blessed with "Golden Ears" and could hear better than most. A 5020 user asked me to stop by to hear his buzzing panel and no matter how hard I tried I could not hear any sound whatsoever while the 28 yr old customer hear the buzz. The moral of the story is my "Golden Ears" are in their "Golden Years".
Third, all panel buzz, and it may be true that Pioneer panels may buzz slightly more than some other panels as they bond the filter on the single glass panel. Their are significant image quality advantages in Pioneer design.
Forth, The radiation pattern is very weak and small and is located directly in front of the panel and can reach somewhere between 6' and 14'. So adjusting the height and angle of the panel can eliminate the buzz.
Fifth, with any background noise or with the volume on even at a low level no one can hear the buzz.
Hope this helps.
Good post Robert but I have to disagree on a few points based on my and other customers experience.
Individual hearing plays a big part what I can hear family members have not been able too.
No surprise luckly I can still hear the higher frequencies in my late 40's or is it lucky?
My 150 was fine till about 130 hours then it developed the cyclical buzz that fluctuates higher on light scenes and lower on dark scenes. This fluctuation is what makes it extremely noticeable.
Brougt it stores attention and tried special power cable, Tripp Lite power conditioner, and power supply replaced as well with no success. Pioneer varified it was the panel and it would have to be replaced. Seveal customers who had the same issue had their sets replaced and the buzz was not there! So not all the panels have the issue! On that note why would my set that had the standard and normal behind the panel buzz that could not be heard during normal viewing develope this issue after 130 hours? I am located at sea level on the East coast so it is altitude causing the problem in our area.
My question still is what is different between the sets. Same location, same person. Could it be how certain components are tightend or dampinning materials are applied during manufacture? Are there Varences in panel assembly or locations?
Now my PQ is outstanding but when I watch and have the buzzing going up and down it is detracts from my viewing. Turn volume up the over power the buzz works until there is a quiet scene.
Also I can hear the buzzing even if I am off axis. I am sitting about 12 feet away and the panel is on a stand.