Almost all tweaks are snake oil and make no difference plus or minus.
Two that really work are room treatment, when applied effectively. Dedicated rectangular listening room is much better but don't go too far towards anechoic just because you can. I dreamt of one thru 40 years and four homes and got to build 4 years ago. Immediately obvious black silence behind the music. Really big deal, but I know not everyone has the space and there are usually...'issues'.
And mass loading particularly under turntables but also phono amps, pre-amps, power supplies. Cutting vibration is important to stylus in groove and electronic components. My set-up stands on thick marble and stone racking, all standing on a 300kg marble slab locked to by pointed cones to the concrete ground slab in the basement. Effectively infinite mass loading incorporating the mass of the Earth.