Forming part of the company’s 100th anniversary celebrations, Celestion has introduced its Ten Squared (Ten2) Series of pro audio drivers. The Ten2 Series has been born out of a specialist development programme at Celestion’s UK-based R&D facility. These cast aluminium frame, neodymium magnet low-frequency pro audio drivers are designed to deliver consistently superior levels of performance in the most demanding professional sound reinforcement applications, even after hundreds of hours of use.
The series comprises five models, each engineered for applications in subwoofers or as bass units in two- or three-way loudspeakers and larger-format line arrays. The line includes the flagship 24-inch TSQ2460, 21-inch TSQ2145, 18-inch TSQ1845, 15-inch TSQ1535 and 12-inch TSQ1230.
Constant airflow through Precision Tuned Venting (PTV), provides efficient cooling around the magnet assembly and voice coils. The cooling potential is further optimised through custom coil winding that uses a hybrid multilayer, inside/outside methodology. In the 21-inch TSQ2460, the cooling benefit was as much as –30° C, versus conventional designs. The PTV and proprietary coil structure are said to combine for a significant reduction of power compression and thermal stress, maximising product lifespan and performance longevity.
The TSQ2460 has a continuous power rating of 4,800W (estimated continuous) thanks to the enhanced cooling offered by the PTV system together with a proprietary voice coil featuring advanced heat resistant adhesives. The Reconfigured Magnet Assembly reportedly allows much greater cone excursion and a high Xprotection level. The driver’s motor strength and mechanical compliance reach their defined Xprotection limit at practically the same point, achieving a low distortion performance, even during high excursion. This capability is complemented by Ten Squared’s Polysiloxane Laminated Dual Suspension design that enables the driver’s suspension system to work much harder without losing stiffness, providing better coil control and reduced likelihood of DC shift, while simultaneously increasing speaker longevity.
In ordinary drivers, the high power and long cone excursion would cause eventual fatigue of lead out wires and joints, but Ten2 uses laser-cauterised holes in the suspension to reduce whipping. The drivers are protected against water and humidity thanks to a solvent application on the loudspeaker cone.