Best audio tweak ever, especially for the over 60s


Get your ears dewaxed at least once a year. After I had the procedure I had to wind back the volume on my amp and iPhone by about 30%. Detail improvement was also incredible. Much cheaper than a $5000 DAC.
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There are over-the-counter products that use a gentle glycerin solution to thin earwax and let it run out.  Mostly sold for swimmer's ear, but can be repurposed here so you don't have to use Q-tips and risk eardrum damage.

There are also simple lavage pumps/syringes to facilitate the process.  Haven't tried one of those.
My best related tweak is wearing Eargasm attenuators during my subway commute in NYC. They even come in audiophile packaging for extra slam.

https://eargasmearplugs.com/
Get rid of all old newspapers, magazines, books. Even better hire a Feng Shui consultant to straighten out your living space. Feel better. Hear better.
Get rid of all old newspapers, magazines, books. Even better hire a Feng Shui consultant to straighten out your living space. Feel better. Hear better.

Have you seen that video of Michael Fremer's listening space?  He's doomed by this standard.

https://www.youtube.com/watch?v=H07NpWk_Xf8