Your most indispensable "tweak"?

I run shotgun bi-wire cables with spades to my speakers, but adding jumpers in the banana connections as well significantly improved imaging and tightened bass to the point that I won’t listen without them. 

Upgrading my Power Conditioner from the Niagara 1200 was a huge leap for me.

@builder3
"Take care of your hearing"
Could not agree more. I built a porch on the back of our previous house during the summer of ’05. Circular and chop saw blaring every day that I was off from work. I ended up with tinnitus and still have it today. I think my hearing is okay as a couple of friends agree with what I hear on my system. But I sure wish I could go back to the summer of ’05 and protect my hearing.

So many interesting suggestions!  Thanks all.  And feel free to keep them coming...

@highend666 - thanks for the link, although completely impossible in my listening space

@stringreen - details of your carbon fiber outlet please?

@sjsfiveo - yes, couldn't agree more about NOS tubes

@soix - not sure what these jumpers look like in action -- can you describe more?

@barbapapa - not familiar with PPT -- what does that stand for?

@chrismini - super interesting suggestion

So many isolation/shelving ideas too -- will look into those.  Thanks!

Debrox > Deoxit.