Anthony Gallo Acoustics has been developing and improving their spherical loudspeakers for more than 20 years. The new $1,998 per pair Reference Strada is the next generation, following the company’s very well received Reference 3.1 . The CDT3 tweeter is the exact same unit which is used in the new $5,995 Reference 3.5, and the dual 5” drivers with neodymium magnets are also found in the 3.5.