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With a diameter of 15 cm the bass drivers are slightly smaller, while the mid-range unit is 12 cm in size. These units are also completely new designs, sharing the same construction features and level of refinement as the drivers employed in the large models.
transmission line; this is made possible by the substantial depth of the cabinet and the folded duct.
The two 15 cm bass drivers have a very low resonant frequency, and are exactly matched to this line. Their extremely hard, embossed cones enable them to generate a very low, forceful and accurate bass.
The 12 cm mid-range unit, the dome tweeter and the sculpted baffle form an acoustic unit which guarantees a constant radiation pattern in the transitional area between mid-range and treble (CD = Constant Directivity). Combined with the narrow baffle, this is responsible for the speaker’s superb radiation characteristics and astonishingly spacious sound.
Since the dome tweeter is positioned below the mid-range unit, the acoustic axis in the mid / treble range rises as the distance to the listener increases, thereby compensating for the speaker’s small height. This is helped by the carefully calculated design of the crossover unit. These features help to produce brilliant, natural-sounding reproduction of the entire mid / treble range significantly above the speaker itself.
In spite of its small size the S 2000 CTL is effortlessly capable of processing high levels, and generates very good deep bass responce. It sounds free and natural, with astonishingly spacious sound and dynamic range.
We christened this series Criterion (benchmark), and this original range proved to be one of the most successful speaker designs ever produced.
Ever since its introduction Criterion has been a byword for loudspeakers equipped with uniquely superior tech-nology, offering extraordinarily good sound and unu-sually high performance.
The latest incarnation of the range is named CTL and consists of three floor-standing loudspeakers that are more compact but even better and more powerful than their predecessors. The speakers boast completely new, ultra-modern high-performance drive units and a transmission line design which has undergone further refinement.
The transmission-line principle offers major advantages over the bass reflex system, but does call for extremely sophisticated cabinet design if the speaker is to exhibit a very low bass cut-off frequency. In specific terms, this means that the sound guide behind the bass drivers (the transmission-line) must be very long – similar to an organ pipe – otherwise very low frequencies cannot be generated.
The new CTL = Compensated Transmission Line series features a cabinet design which even compensates the acoustical impedance of the system. Each cabinet consists of a sealed internal case into which the transmission line is glued.
This construction not only renders the cabinets very heavy, but also extremely rigid, eliminating all traces of resonance effects. The side and wall panels consist of heavy-duty HDF, finished either with multiple coats of rubbed lacquer, selected, top-quality hardwood veneers or carbon.
The baffles feature a newly developed design which we have christened “organic baffle”. The apertures for the speaker drive units are machined to a three-dimensional shape out of the solid baffle material, and act as carefully calculated sound guides generating outstandingly good dispersion characteristics, especially in the mid / high frequency range.
The cabinet material is either HDF – for the lacquered versions – or solid wood for the hardwood versions.
The completely new speaker drive units are our latest development, and incorporate the latest design features such as huge magnets, high-performance voice coils, special embossed cones and professional-standard aluminium baskets. They work together to provide a frequency response, maximum sound pressure and reproduction quality which have never been possible before.