« Reply #2 on: May 26, 2020, 03:34:30 PM »
There is a definite difference in tone between the Sitka/Sapele pairing and the Mahogany/Blackwood pairing. As Sapele is a close cousin of Mahogany, there is probably less tonal difference between a 312 and a 512 than a 312 and a 322.
Something that helped me conceptualize how these tonewoods all play together is to think of the guitar top as the acoustical source (which is probably why it's sometimes referred to as a soundboard), and the body as an acoustical 'mirror' in the sense that it reflects certain frequencies to our ear. Some tone woods (like Sapele and Mahogany) reflect mostly mid-range frequencies and sound 'warmer;' others (like Maple) are biased more toward the high frequencies and sound very clear and bright; some (like Rosewood and Cocobolo) cover a wide range of frequencies, spanning from low to high, and provide good overall balance. Blackwood tends to be (at least to my ear) like it's acacia cousin, Koa (reflecting the mids and trebles), but with more clarity and less 'warmth.'
So a 312 would sound balanced, dominated mainly by the mids and having an added touch of warmth. A 512 would still be dominated by the mids, sounding even more 'warm' because the Cedar top would bounce more of that acoustic characteristic off of its Mahogany 'reflector.' But the best description I've found for the Mahogany/Blackwood 300's is "darkly clear." The Mahogany top is not the acoustical 'mirror,' but now becomes the acoustical source -- so balanced but with focus on the mids -- which is now getting reflected back to our ears by the Blackwood body with a bit more clarity and 'sparkle.'
I also like the Mahogany/Blackwood pairing -- much better than the previous pairing of Mahogany/Sapele in the 300 Series, which was just too sonically 'one-dimensional' to my ears, if that makes any sense...
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