BTW, upgrading the internal wiring and replacing the resistor to the T27 was a substantial upgrade to the tweeter’s performance on the 101s. Replacing the wiring and bypassing the overload protection circuit (S-STOP) yielded a big improvement to the entire bass response. I also upgraded as many crossover parts as I was able to. They really sound quite wonderful. In comparison, the stock 101s sounded compressed, bass deficient, and the T27 had noticeable grittiness.
The 101s, both stock and modded, are quite power hungry. I’ve found they sound their best powered by 90wpc Altec monoblocks (modified 1569s). Using this combo, the dynamics are quite impressive too.