Tweaks that work? (yes very subjective topic)


So I wanted to put this out here to the group and I am hoping for a detailed response from @millercarbon.

What tweaks have you done to your system that have worked?

I am looking to fine tune or tweak my system and this is what I have now.

Rega Planar 8 with Dynavector Cartridge 20x2 LO. 
Audiophile Linear PSU SE for the Rega.
Moon by Simaudio 390 Streaming Pre Amp.
Moon by Simaudio 330A Amplifier
Moon by Simaudio 230 HAD
Moon by Simaudio 260D CD Transport.
Raven Audio CeLest Tower Speakers
Raven Audio Soniquil Speaker Cable, Power Cables, XLR Cable.
Transparent Audio 75 Ohm Digital Link 
Furman Elite 15 PF power conditioner.
All are resting on Butcher Block Acoustics Platforms. 

Look forward to the insight.
128x128skypunk
Hrmmm...a good topic to get jettisoned.  Speaker placement general, then, angle fore and aft, side to side...tiny increments...do the work.  Adjust sweet-spot if necessary.  Taking measurements all around helps. 

Resonances:  LARGE (cd shelves, window panes, picture frames, loose fixtures) SMALL (gear cases and their surfaces) ...then SMALLER STILL (under the hood inner work when possible...think tuning dots) ...and yes, harm can be done...experiment, easily reversible. 

Level all gear, especially cdps.  Isolate digital source power, when possible.  Same type surfaces for gear, if possible.  Furutech outlets, spring loaded that won't create the problems over time with overly tight grip, in/out for storms, etc.  Felt around tweeters (to a lesser extent midrange drivers) to address diffraction..self-adhesives can be found at craft stores.  Solder or pressure affix crossover lead wires to drivers...at least check connections. 

When the system reaches levels of exacting refinement, cable lifting, addressing RFI with ERS around the middle section of power cords, improved cabling and connectors, upgrading plugs etc increases the chain of cumulative benefits that allow tweaks to become more easily identifiable towards your goals. 

Most importantly, keep it fun!  Over 50 years, my passion has never waned.  Recent upgrades have freshened my entire collection.  The hobby is personal and only a select few have diy skills.  Don't be discouraged.  There is always something to learn and to try.   If, like me, you can't afford to pursue vinyl, find a friend that does.  We generally are very solitary creatures.  My circle of music lovers are some of the most generous, finest people I've known.  Ok, let's keep our sticks flat on the ice.  (You know who you are.  Smile.)  More Peace, Pin   
Oh, and another freebee..every 6 months or so, turn of the mains power switch(s) to your power and to your dedicated line(s) to maintain clean contact.  This can be part of the periodic cleaning of all electrical contacts...audio hygiene.  :)  Pin
I remember back in the early days of cd. someone came out with a sticky disc size backing that was placed on the label side, seems much like what Geoff is referring to. I have one but don't recall on which disc
The Japanese distributor of fo.Q just cancelled my order and issued a refund. Drat!