EX-30

CDT introduces the EX-30
3-way compact Mid-woofer E.Q. crossover


Finally, we have created a compact economical solution to installation of a front-mounted 3-
way system for the general market.
This crossover module offers interactive crossover to and adjustability of the mid-range and
tweeter and a high-tech elliptic filter to crossover the tweeter.
New and unprecedented functionality in this unit is highlighted by the superiority of the
midrange level setting.



Designed to produce a crossover to the midrange around 250 Hz with a seven-inch woofer
and four-inch midrange in a typical installation, this crossover produces amazing results with
ease in a minimal occupied space.
The proprietary series connected tapped inductor maintains damping to the midrange and
woofer on all levels and interacts to vary the crossover Q. As the midrange level is reduced,
the crossover Q to both drivers is parametrically altered to automatically produce an optimal
crossover to both drivers at all selected levels.

The midrange is allowed to crossover to the tweeter based on its natural character.
This minimalist approach will produce the best sound in most installations.
Choose the mounting position and select the drivers to accommodate your vehicle and to
facilitate a natural sound. A very small, extended range speaker can also be selected to
augment the tweeter response especially if a high mounting position is chosen for the tweeter.
Tweeter crossover is accomplished with a fast fifth-order elliptic that brings in the tweeter
quickly and invisibly to complement a broad variety tweeters and midrange drivers in most
locations. Crossover will typically be achieved around 5 kHz depending on driver selection and
relative mounting position. Extended-range midrange speakers can raise the crossover to
produce a blend up to 10 kHz typically.

Three-way configurations will create an installation that gives the smoothest midrange, the
most flexibility in mounting the drivers for a smooth blend and finally gives the best bass
impact. Midrange drivers, because they are small and require minimal enclosure volume, can
usually be located conveniently close to the tweeter.
Installation of this unit is totally straightforward and trouble-free.
EX-30DT Terminals are clearly marked with the designated connections and polarity.
Level setting switches are clearly marked and each offers 3 positions.
Start with all the level settings to high. All tone controls are set to flat. With a vocal recording
try reducing the midrange level for a natural sound. Next with a recording that includes
cymbals set the tweeter level for a natural top-end.