« Reply #3 on: December 19, 2015, 11:13:48 AM »
My understanding is that the torrefication process sonically 'ages' the wood -- gives it a more 'played-in' quality straight out of the box, so to speak. It may be that this was part of the re-voicing formula for the 600 Series, meant to help diminish the characteristic brightness of Maple; and that torrefied tops weren't viewed as necessary for other series where the body woods are not as bright-sounding.
Personally, I like a brighter-sounding guitar. And since the only guitars I've personally heard that use a torrefied top are the re-voiced 600 Series, I've not become drawn to them as a BTO design element. But like any good business, should Taylor receive enough requests for torrefied tops or AP bracing in the BTO line, they will probably change their tune and offer the option. Unfortunately, it may take patience on the part of folks like you who want that option today...
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DN: 360e, 510ce, 510e-FLTD, 810ce-LTD (Braz RW), PS10ce
GA: 414ce, 614ce-LTD, 714ce-FLTD, BR-V, BTO (Makore, 'Wild Grain' RW, Blkwood), GAce-FLTD, K24ce, PS14ce (Coco, Braz RW, "Milagro"), W14ce-LTD
GC: 812ce-LTD TF, BTO TF ('Sinker'/Walnut, Engelmann/"Milagro"), LTG #400
GO: 718e-FLTD, BTO (Taz Myrtle)
GS: Custom 516e, BTO 12's (Taz Tiger Myrtle, 'Crazy' RW), 556ce, 656ce, K66ce, PS56ce ("Milagro")
GS Mini 2012 Spring LTD (Blackwood)
T3/B: Custom (Cu & Au Sparkle)
T5: C1, C5-12, S (Aztec Gold)