As I recall, Zu used split tuning of the four rear firing drivers. While it might have had advantages with that particular configuration, it does not compare to the new single downward firing driver.
The great off-axis imaging (it really does not matter where i sit or stand) as well as the ability to position the 4s within inches of the rear wall were unexpected benefits.
The great off-axis imaging (it really does not matter where i sit or stand) as well as the ability to position the 4s within inches of the rear wall were unexpected benefits.