Gallo hi-fi system - A'Diva, Due and Micro speakers with MPS 150 powered subwoofer

A new high in high frequencies

Anthony Gallo Acoustics' crowning achievement is our incomparable tweeter - the Cylindrical Diaphragm Transducer (as used in the new Dué loudspeaker), or CDT™. Universally hailed as the finest high frequency driver available, the CDT accomplishes a number of seemingly contradictory goals.

With a surface area of 24 square inches, the CDTs' diaphragm has approximately the same output potential as 32 one-inch dome tweeters. But because our driver needs no voice coil or motor assembly, moving mass is negligible, providing unmatched transient response. Power handling is virtually unlimited, yet the driver is extremely efficient. And since this driver presents the amplifier with a purely capacitive load, it blocks low frequencies without the need for a crossover. Most importantly however, the CDT™ delivers ruler-flat frequency response from 2,500 Hz to beyond audibility across an unprecedented 330 degree axis of horizontal dispersion! Off-axis response remains identical to the on-axis measurement across the driver's entire radiation pattern. For the music lover, this nearly omnidirectional output means that perfect imaging is not limited to a small "sweet spot" directly between the speakers, but extends to the farthest reaches of the listening room.

How does the CDT work?

Unlike conventional dome or cone drivers, the CDT™ uses no voice coil or magnets. Instead, the signal is passed across the conductive surface of the diaphragm, which attempts to expand, while the cylindrical shape of the driver supplies the necessary restorative force. Despite its avant-garde engineering, the CDT™ is astoundingly simple. Fabricated from KynarT, an aerospace plastic, the diaphragm membrane is coated with pure silver - the best conductor known to man. High purity OFC (oxygen free copper) wire leads are silver soldered to each end, and the finished assembly is tightly wrapped around a variable-density, woven polypropylene core, which provides complete attenuation of the driver's backwave. Housed in its custom made aluminium enclosure, our tweeter is completely impervious to electrical or mechanical damage.

No crossover is the best crossover

In all multi-driver loudspeakers, the woofer, tweeter and midrange must be blended for smooth response. Designers routinely accomplish this task with complex filter networks known as crossovers. Unfortunately, even the best of these circuits introduce phase and time distortions, and force the delicate music signal to pass through a host of electrical components. Once again, Anthony Gallo has developed a superior solution.

Through rigourous selection and treatment of the woofer, in conjunction with a tweeter which rejects low frequencies, Nucleus series loudspeakers deliver smooth, linear output without a crossover. In fact, only a short piece of high quality wire stands between each binding post and woofer solder tab - the simplest signal path possible! For the first time, the seamless purity of the best full-range electrostatics is available in a small, efficient and highly dynamic package.

The Micro accomplishes this task with a similarly elegant solution. Utilising our patent pending S2 technology, the Micro can use only a single full range driver to cover the entire frequency range from 100 Hz up. This is the critical vocal range and the area where box designs and crossovers cause the most damage. Thus we have found an inexpensive way to create the same transparency and detail once available only with the CDT™ at much higher cost.

We hope that you now have a better understanding of where the Micro came from and why it will outperform similarly sized conventional technologies. The Micro is capable of delivering very detailed and holographic sound, in a word realism. The Nucleus Micro maintains our high end heritage and utilises all we have learned during our first seven years of research and development.