Yes the different size matters. On the electronics, the larger size adds more. warmth than the pen blank size. It did also on the speakers, but the result was just too much (for my needs). So back to the pen blank size.The types of wood I have tried also matter.
African Blackwood is a little more bass. (Since live in a ’over 55’ complex, I really don’t want ’more bass’ since bass is what really goes through the walls.. (I mentioned I can go in my bathroom to ’check’ for bass through the walls. And my speakers if I let them would certainly boom. I just do a lot to lessen the bass.) So the Aftrican Blackwood may be just right for anyone wanting a bit fuller bass besides clarity and warmer presentation. Plus even others have mentioned it is used under power transformers, and I find it is good under my conditioners.
The Cocobolo is a little more even through the full range Offering a bit of clarity and warmer presentation. I have described it as using warmer better tubes.. It seems to have more bass, but not enough to go through the walls on my test music.
I tried smaller pieces of Walnut, and was not finding much to say. One reason I mention stick to the really heavy dense wood.
I own a few other types, but have not really pinned down the exact attributes for them. (I have only been doing this for a little over a month? six weeks?)I jut ordered four Bolivian Rosewood 4x4" by 2" bowl blanks (I got the last 4) just to try THAT size under my Audio Research SP-15 preamp I use just for the phono stage. That has enough room under it for butcher blocks and the bowl blanks. I have no Bocote, so let me know if you use it. Bocote is also used in musical instruments. so that is a good sign for it's use!
I do not know if the fact I use the exotic wood on TOP OF butcher blocks matters??? I really went all out and put butcher blocks on every shelf , and under every bit of kit. Some even doubled, like my TTs and the amplifier. In other posts I had mentioned the adding butcher blocks was similar to adding better interconnects. and sort of pricewise too. So if I spent $1000 on them, it was like adding one $1000 IC cable.
So I cannot separate the butcher blocks from the added exotic wood., on the effects part.
One thing I noted a bit is that the knife scale is almost (well a little anyway) like the Golden ratio 1.61.. In that they are 1 to 1.5 to 2 times the final ratio. I do not know if that matters? Someone may make them fit that ratio by making them a bit skinnier.. Or making some larger ones to meet the ratio values.