If you wear glasses, take them off when listening. It works for me. Those hard, reflective surfaces in close proximity to your ears... Obviously, this tip only applies to listening to speakers, not headphones!!!
Don't worry, a reflecting bald head has an even dispersion pattern similar to MBL speakers! My tip? I use a Mucinex pill to inhibit mucus production. Works wonders draining sinus cavities. Really sharpens my hearing! Can't tell you my best tip. It isn't legal in my state (yet).
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