" Blue Printed "
As a DIYer I can tell you that it is impossible for me to "blue print " my crossover boards , but I can and have been able to " balance " them . To truly blue print a board one must have a box full of each component in order to find components that are the exact values as the schematics , this is what Jim did when he personally checked, measured and approved review samples .
But " balanced " is something that I believe that every Thiel speaker from Lexington is , that is that a 2 ohm resistor might measure 2.1 ohms so finding another one for the other board you'll be balanced same goes for a capacitors values , as long as all the values are within a tolerance set by Thiels quality control .
I'm bring this up because after removing the resistors and capacitors I measured them and discovered resistors that were more than 5% tolerance and electrolytic capacitors that up to 30% out of tolerance ! But since My speakers came from Tennessee and had been put together or repaired there I won't say that this is typical but I was surprised to have measured such differences in the resistors that are used in all Thiel speakers and very disappointed in the electrolytic caps that I took out and then have the same issue with the new replacements ! I purchased a different manufacturer and received caps that were closer to being within tolerance at least they were the same values , So while none of the new components were exact schematic values they were almost exact match pairs thus balanced L & R crossovers .
DIYing is not something that is easy but in my case it turned out to be extremely rewarding because now with upgraded components I know these sound better than stock as well as fixing the FrankenThiel lack of quality crossovers that " New Thiel Audio " sold me .
