A few too many thoughts (improved, or otherwise). Mike, if as-close-as-you-can-get to truth-to-the-original (in restoration terms) is your concern, then I believe that the AR-3a tweeter is correct for your AR-3a Improved, unless you are certain that your speakers had something different, factory-installed, to begin with. Klaus, I agree with your observation, that is what I was hoping to show; that the AR-3a Improved can be seen with several variations of the AR-3a hi-range (Fig. A.19, A.20 and A