The best and most difficult to find Tympani speakers. The incomparable Tympani 4A's with the ribbon tweeter. I have used the Tympani 1D's and these speakers are far more transparent and there is no comparison in the high end with the ribbon tweeter. In many ways these are better than 20.1's especially in the their thunderous bass region.
These are great speakers and I hate to have to sell them along with a number of other items that I have listed. They are in excellent condition and have far upgraded crossovers done by a local DIY savant. Have Magnepan Boxes and copy of owner's manual