CDT Audio systems in the Eurosport line utilize a 26mm soft dome tweeter a matching crossover and a large selection of mid/woofers in either of two configurations ? separate drivers or quasi-coaxial Braxial configurations.
All mid/woofers utilize Kevlar fabric cones with semi-soft polymer domes and rubber surrounds. These superior divers feature virtually unlimited life and extreme "quality". Ultra low distortion and smoothly controlled roll-off characteristics are provided.
The specific grain oriented construction exemplified in Kevlar fabric cones ensures that so called break-up is organized into a controlled polar oriented vibration modality that precludes harsh bell modes or random breakup. The result is astounding naturalness and precision. The measurements show smooth extension and glitch-free roll-off. The soft dome Euro tweeter has the classic dome shape and an ultra smooth response shape. This tweeter with its excellent power handling ability is further cultured by the matching crossover that corrects the smoothly sloped response shape and corrects that shape.
This improved shape is flatter and more extended as a result thereby giving the power handling benefit of a larger soft dome with the power response profile of a lower power handling 19 mm size driver.
This improved shape is flatter and more extended as a result thereby giving the power handling benefit of a larger soft dome with the power response profile of a lower power handling 19 mm size driver. This is critical to natural airy sound yet with authority.
The two drivers are then also interfaced with each other with a proprietary crossover using an elliptical high-pass characteristic. This type of filter utilizes intra circuit phase relationships to produce rapid response changes. Within a narrow band signal cancellation by subtraction occurs allowing a rapid response roll-off without the attendant transient response smear and complexity of conventional high order filters.
High frequencies to the front:
The sound image is moved more towards the front of the vehicle by gradually shifting the highest frequencies exclusively to the front of the vehicle, purposely directing (cross-firing) them inward and at an angle, using the windshield as a virtual ground plane. It is unlike any conventional speaker placement philosophy, but no other system creates the imaging effect of StageFront?
Less "highs" from the doors:
All door speakers in the system are shaped and blended to keep the existing (typically two-way) door speakers radiating nearly flat power up to carefully lowered upper cutoff frequency. These higher frequencies are typically directional and can interfere with the angular dispersion pattern created by the StageFront, super tweeters mounted “cross-firing” up on the dash. This careful shaping and blending process enables the dash mounted tweeters to work transparently without creating a haze of localized reverberation in the front of the car. Unless the special StageFront universally compatible blending filter modules are used, the added tweeters would actually collapse the more natural and transparent frontal sound field that StageFront creates. Our extensive listening tests support this conclusion. The effects of StageFront technology are NOT subtle.