What one change to your room, system, or setup made the biggest improvement?

@elliottbnewcombjr ,

Gorgeous turntable!

But really, you shouldn't keep your toothbrush and floss on it...

@thecarpathian 

funny,

That damn tonearm came with a bad wire, had to have VAS re-wire it, so I put the old wire in the photo to remind me.

I found that toothbrush on Amazon, I love the tall bristles that let you stay further away, and wood not plastic (unavailable)

https://www.amazon.com/dp/B0CQC1TN25?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1

search is so easy these days

Here it seems to be (I paid less than this)

https://helixsounds.com/products/turntable-stylus-brush-cleaner

need black or plastic

https://www.groovewasher.com/products/groovewasher-stylus-brush

better price

https://www.ebay.com/itm/115390515612?itmmeta=01KS05CV2KX73WY8EPXXA5N0ZN&hash=item1addcf899c:g:QEAAAOSws7die952&itmprp=enc%3AAQALAAAA4DKQclQvzFwZQpmMrsO4LupvlyyTTKNiD48FkiCGGYo4ZavbKoEOTc8RMt5Vlw4GuqLl8M3tjyeFgB21sz4SopEC9SRLwzJBWIJF9VpCVSwAD%2FRKnJSs0GPZKtBaUOxVr6BE%2BbhB4za5wAKrM28Tpy%2B%2BMoef%2FCn2SaAzWeCe%2BD6YpPyzkUUhOj%2FyLK3FOSW2w40Lr1EZ%2BCf30wEaqS2M%2BsxfNMn3TepeHZFtivS8MJUB4J%2BkKcP8RnD8hVBgFjwlPYUb0Qoy%2FY8ULXDd97XOyJO4NwWKyYHVmgMH2MPFyhdO%7Ctkp%3ABk9SR7Kxs4XIZw

Speaker placement

Most recent was replacing the Alpha USB with Denefrips Gaia.  I had no expectations and was truly surprised at the dramatic improvement.  Afterall 1s are 1s.  

Because the room is 50% of the sound: bass traps and first reflection diffusion.