Birch drums are part of the Yamaha heritage, and Absolute Birch has been the industry standard since it was introduced. With a new mounting system and some hot new finishes, the bar has been raised once again. Back by popular demand, the sleek, classic design of the original Absolute lug is now the standard lug in the Absolute series. This lug anchors to the shell at the nodal point using a single bolt, reducing the number of holes in the shell. The small size of the lug allows it to make very little contact with the shell, and reduces the amount of shell vibration that is dampened.
YESS II mounting system:
The new version of Yamaha’s YESS mounting system anchors the mount at the top and bottom nodal point of the shell. The mounting bracket is attached to a metal plate, and this assembly is isolated from the shell using rubber grommets. By shock-mounting the shell in this manner, no vibration is able to escape the shell through the hardware. The lugs are placed at a point that filters out unwanted overtones. This system gives the Absolute series a bigger sound and a pure tone with more warmth and sustain.
Finish Choices:
Core finishes usually available 1-2 weeks from order date.
FasTrac finishes usually available 8-12 weeks from order date.
 "Yamaha Drums - Yamaha Birch Custom Absolute Component Drums")