canary audio cd 100 better than bluenote koala?

I bought a can of compressed air at Office Depot and blew out the dust in my amp and preamp. I'd say it made a 2.75% improvement. As always YMMV.

I'm doing the phono preamp today and expect another 2.376% improvement. I'll post the results later.

Well bad news on the phono preamp. I only realized a 1.1% improvement.

My next move is a MinWax polishing of the amp/preamp capacitors and a touch up of the transformers with heat resistant black enamel paint.

I expect 2%-3% overall increase in sonic quality and will report back soon.

Audio let me explain. I know what I say could be as you say meaningless to others. The 1% improvement is justa figure I pulled out of thin air. What that % is, no one can say. But fact is the changed opamps made a difference,. The new Sovtek tubes made a diff. Now to some that money spent was not justified, but to me it certainly was. My classical collection is something important, and I am glad if I can bring the sound up a notch or 2, for a reasonable amount of investment.
I have decided to change the caps, but this will be in november. I'll post the results.

it serves no purpose to quantify perceived changes in sound.

one person's 2 percent is another's "i don't hear any change".

i beleive for ordinary communication it is sufficient to use qualitative terms. the intent is to explain that a change in a component was accompanied by an observable change in the sound of a stereo system.

in terms of magnitude, it may not be necessary to precise.