Is there an optimal design for the transition box (manifold) ?
The box should be as short and compact in length/height as possible. Designs like Tom Nousaine’s TSTSTW or 12 Shiva’s Dancing have cancellation issues due to the arrival times between the drivers nearest the listener vs those farther away. In certain circumstances these cancellations are beneficial, under normal circumstances they should be avoided. The ideal box is a single driver in height/length. An example of this would be a 18″-20″ cube with drivers mounted facing in from the sides. This design allows 2 15″ drivers to be used initially, and 2 more drivers could be add later if additional output is needed/wanted.
