A Belt around the ear
No point in shaving the μs until you have decked your listening room with an array of these products:
I particularly recommend slathering your body with Peter Belt's Cream Electret (£20 for 15ml) before settling down to an evening of audiophilia, and, if you are old school and still play those spinny disc thingies, his Rainbow Electret Foil stickers are a must-have. Make sure these are correctly placed or the won't have any audible effect:
"These small, prismatic stickers are meant to be cut into smaller strips and placed directly over the '33 1/3' on an LP label, or over the Compact Disc logo on the label side of a CD."
(Not sure where they go on your 45s.)
You may also discern problems with parasitic resonances. Either take worming tablets (Mebendazole may work) or invest in a pair of Totem Acoustic Beaks (note that these are not intended for anal insertion, but there's nothing wrong with a bit of experimentation—if you have any Cream Electret left over it may come in handy here).