A classic ATC Soft Dome Monitoring - Friends around the world (special limited edition print) poster 66/100 signed by ATC's founder and chief engineer Billy Woodman on display here at Musicraft (Derby).



ATC SH25-76 and Super SH25-76S HF drive units -

Finally, after years of painstaking development, we are proud to introduce a pair of HF drivers worthy of partnering ATC's range of formidable bass/mid and mid-range drive units. The outstanding SH25-76 and range-topping SH25-76S are the product of over 40 years' experience building the world's finest acoustic transducers.

http://atcloudspeakers.co.uk/technology/


ATC SH25-76 Soft Dome Tweeter


ATC Super SH25-76S Soft Dome Tweeter



ATC, Acoustic Transducer Company, is a specialist British manufacturer of loudspeaker drive units and complete sound reproduction systems, including the relevant electronic equipment. ATC designs and manufactures the finest and most accurate of monitors in the world. ATC achieves this by designing and manufacturing loudspeaker drive units and systems to achieve levels of performance far in excess of the industry norm. ATC has kept to its aims of building loudspeakers and electronics which employ the most effective of modern engineering principles. ATC don't respond to competition, instead ATC responds to advances in technology that enables ATC to improve their products. ATC's goal is to have loudspeakers as near perfection in performance as possible by having the lowest possible distortion.

All ATC products are built to meet the challenge of the latest digital recording technologies, while providing nothing less than the best sound reproduction money can buy.

By selecting ATC you join a group of music lovers, professional audio engineers, educators, studios, and musicians across the world that understand the value of the engineering that goes into every ATC product.

ATC’s products are installed at some of the world’s most prestigious multi-channel studios and auditoria. Where ever the best is required you will find ATC.

http://vimeo.com/107575611?from=outro-embed (ATC's 40th Anniversary Celebration video)

http://atcforums.co.uk/pdf/ATC%20CORP%20BROCHURE.pdf (ATC Corporate brochure)


ATC Transducer. The sound of accuracy. Naturally.



Dual Suspension tweeter -



The additional stability over other designs negates the use of ferro-fluid, so ATC tweeters perform at their best for longer, and the magnetic gap can be made smaller, further improving power handling.



ATC's approach to tweeter design is unique in the marketplace. By incorporating a secondary suspension component the moving assembly is naturally constrained to travel only in the axial direction. The result is a design that suppresses rocking modes and ensures lower distortion levels. The additional stability that this approach provides over more conventional tweeter construction negates the need for ferro-fluid (usually required for cooling, damping, etc). As a consequence, the magnetic gap can be made smaller allowing ATC tweeters to not only perform optimally, for longer, but also offer improved power handling over conventional designs.

While this unique tweeter topology offers superior performance, the resultant increased moving mass and overall complexity must be offset and overcome by the perfect alignment of all components. Consequently manufacturing and assembly demands exceptional care and accuracy - a level of capability that ATC excels at.

The standard SH25-76 and its ultimate 'S' spec stable mate approach these engineering challenges in different but equally successful ways. The standard tweeter has a novel and lighter moving mass bracing component, while the 'S' spec driver has an exceptionally powerful motor assembly that, when combined with the optimally stiff and lightweight coil former, delivers vanishing low levels of odd harmonic distortion and a well controlled extended frequency response beyond the limit of human hearing.

Fully Optimised Neodymium Motor Assemblies -



Each tweeter motor assembly employs a magnetically annealed top plate and huge N48M Neodymium ring magnet, the geometry of which has been individually optimised using finite element analysis to ensure the best possible performance. Achieving an incredibly high flux density of over 2.0T in the magnetic gap, the magnet assembly of the SH25-76S is fully saturated and therefore free from the effects of flux modulation in the surrounding metalwork, lowering odd harmonic distortion to below -70dB across the operating band. The high levels of flux density in the gap combined with a short coil long gap configuration result in a linear and extended frequency response beyond 20kHz.


ATC Super SH25-76S Soft Dome Tweeter


ATC Super SH25-76S Soft Dome Tweeter


ATC SCM100ASL Professional Monitors used here at Musicraft (Derby)


ATC SCM100ASL Professional Monitors used here at Musicraft (Derby)


ATC SCM100ASL Professional monitors


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Thanks

Rick @ Musicraft