I do have ear problems, Meniere's disease, causing tinnitus, and fortunately not vertigo). I've done a lot of reading on audio as it relates to ear problems. This is not normal and your ears are telling you something you need to pay attention to. They are telling you they don't like what you are doing to them. And yes permanent damage can be caused, as noted above.
All the people reporting problems in this thread are experiencing hyperacusis, or sensitivity to sound. Not all sounds, but maybe in certain frequencies. I'd try test tones and a meter (or REW) with the denon and figure out if it's putting out a spike in a frequency that is driving you bonkers. Use ear protection when you do so. (over ear, not in ear, you can get a set of ear cans from home depot. Any one doing room calibration should where over ear protection. You don't want to test if your ears respond, just look for spikes that may be and indication of something at fault with your receiver ) Alternatively, if the denon is the common denominator, it'd be out of my house so fast.... I might not even bother testing.
Sound is typically a good therapy for stuff like this, at low levels. After almost quitting audio, I started using music (at low levels) to habituate my brain to the tinnitus. To do this you listen to music at such a level that you can still hear your tinnitus, don't drown it out, and focus your brain on enjoying the music. It has worked pretty good over the years. I mostly go through a day and don't notice my tinnitus too much even though it varies sometimes from day to day, somedays almost silent, some days like a locomotive going through my head. (Cold fronts oddly aggravate it and make it worse, a sign of Meneire's and not noise induced tinnitus.
All was good until last December when I was in a car wreck. 7 airbags went off in the car. An airbag is about 170 db. The car dealer told me they have a device for setting off air bags that they use for airbag recalls as they can't throw them away that way. He said it's like a cannon going off. My neurotologist (part neurologist part ent) gave me steroids, then steroid injections in my ears and I took magnesium for 6 months and am now back to where I was before the wreck, but I suffered some additional hearing loss from it, but I still don't need hearing aids. Although I now do get variable hyperacusis some now, but mostly it's things like the church organ that drive me bonkers so I just discretely put in ear plugs when they play it.
I'd have suspected subs, but the latest respondent doesn't have subs. The sub forum had a whole thread years ago with tons of people experiencing tinnitus. I don't have a sub so I haven't been to check on that in a long time. I just bought a good full range speaker and don't worry about subs.
Sorry for the rambling. The moral to the story, is protect your ears!!! Enjoy your hobby, but protect!
Supercharged Song Towers, Oppo BDP-203, Anthem MRX-520, LG B6 OLED
Headphone Rig: Oppo BDP-95, Burson Audio Soloist MKII Headphone amp/ Sennheiser HD800S, Sennheiser HD650
Last edited by glangford; 10-09-2019 at 03:07 AM.