Ik heb eens even zitten Googlen...
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http://www.pantheonguitars.com/adirondack.htm
ABOUT ADIRONDACK - quoted from the article on "Tonewoods" by Dana Bourgeois
Adirondack Red Spruce was plentiful in our country before the war and was used on many of the great pre-war guitars. Eastern red spruce, also known as Adirondack or Appalachian spruce, was the primary topwood used by American manufacturers before World War II. Its use was all but discontinued due to over-harvesting of the resource but has recently been reintroduced thanks to 50 years of regeneration and to the legendary status that this traditional tonewood has attained. The small size of most logs and a shortage of wood conforming to market preference for even color and regularity of grain conspire to keep the price of red spruce extremely high.
Red spruce is relatively heavy, has a high velocity of sound, and has the highest stiffness across and along the grain of all the topwoods. Like Sitka, it has strong fundamentals, but it also exhibits a more complex overtone content. Tops made out of red spruce have the highest volume ceiling of any species, yet they also have a rich fullness of tone that retains clarity at all dynamic levels. If players and builders were able to overcome phobias about unevenness of color, grain irregularity, minor knots, and four-piece tops, many more great-sounding guitars could be produced while the supply of potentially usable red spruce is still available. Old-growth woods are disappearing so fast that such an attitude change will need to be scheduled sometime in the near future, unless the majority of new guitars are to be made of synthetic materials.
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http://www.ellisguitars.com/Adironda...tkaSpruce.html
ADIRONDACK or RED SPRUCE versus SITKA SPRUCE
Adirondack or Red Spruce was very popular piror to WWII. It is found on a lot vintage acoustic guitars. The high strength to weight ratio made it useful in the construction of aeroplane wings during the war. The ratio is what makes it so prized amongst guitar Luthiers. After the war most of the good trees were gone, and what is still available, has cosmetic flaws. If you can put up with this it still makes great sounding guitars especially if you want a new guitar with that vintage sound. This scarcity led to the use of Sitka Spruce as the number one guitar top of the big guitar Luthiers. It is found on most guitars. If you step into some guitar shops like I have and ask to play an Adirondack you will often be greeted with a puzzled look from the shop assistant. The easiest way to get you hands on one is to play a vintage instrument or have a custom guitar built.
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http://en.wikipedia.org/wiki/Tonewood
Adirondack
This legendary wood that Martin used for its tops throughout its golden years came from the East Coast, from the Southern Mountains into New England and upper New York State. Called both Appalachian and Adirondack spruce, it has a creamy white color. Similar to Sitka, Adirondack responds well to either a light or firm touch. It has more overall resonance than Sitka. Interesting grain color variations make this another visually desirable top. Adirondack has been unavailable since the mid-1940's. Virgin growth has been (fortunately) preserved in National parks, the rest is all second growth, plentiful but too small to be usable for guitar tops until recently. Guitar makers have started finding second growth of at least 100 years old that is big enough to be used for tops again. Adirondack is, like Alpine spruce, very expensive and mainly used for top of the range acoustic guitars.
