CST: COHERENT SOURCE TRANSDUCER.

THE CONCENTRIC SOLUTION.

THE CST USES TECHNOLOGY DEVELOPED FROM THE TAD REFERENCE ONE AND EX SERIES SPEAKERS.

The CST employs a tweeter, con- centrically mounted at the apex of the bass/midrange driver cone to maintain sonic coherence and seamless linearity.This configuration ensures that sound propagates as if

from a single point source, maximizing image stability and dramatically reducing interference.

Directivity is precisely controlled at all frequencies, and direct and reflected sound arrives at the listener

with matched timbre—especially important with in-ceiling speakers, where unwanted reflections compro- mise clarity and impact.

Listeners enjoy a wider sweet spot than with pivoting coplanar and

coaxial designs, while the CST’s controlled dispersion increases flexibility and installation options. Uniform delivery of sound means that even off-axis positions can promise the excitement of a front-row seat.

COPLANAR

COAXIAL

PIONEER CST TECHNOLOGY

COAXIAL

PIONEER CST TECHNOLOGY

Coplanar: Separate Woofer and Tweeter Coaxial Driver: Concentric, Not Coherent CST: Coherent Source Transducer

Acceptable sound is only achieved over a relatively small area due to mismatched directivities and driver interference.

Improves upon coplanar designs, with a larger but still limited listening area by eliminating driver interference.

Matched directivity and elimination of driver interfer- ence results in sound as realistic off-axis as on-center.

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Pioneer S-IW891, S-IW691 manual CST Coherent Source Transducer Concentric Solution, Coplanar Coaxial Pioneer CST Technology
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S-IC691A, S-IC891A, S-IW691L, S-IW551L, S-IW691 specifications

Pioneer has long been a leading name in audio technology, known for producing high-quality speakers that cater to various listening environments. Among its lineup are the Pioneer S-IW551L, S-IC891A, S-IC691A, S-IW891, and S-IW691L models, each designed to deliver exceptional sound quality while seamlessly integrating into your home or commercial setup.

The S-IW551L is a standout in Pioneer’s in-wall speaker category. Equipped with a dual 5.25-inch woofers and a 1-inch soft dome tweeter, it provides a balanced, dynamic sound with impressive bass response. Its easy installation process, combined with a paintable grille, allows for flexible placement in any room while maintaining aesthetic appeal.

The S-IC891A, an in-ceiling speaker, showcases advanced design that makes it perfect for both home theater and music applications. It features an 8-inch polypropylene woofer and a 1-inch pivoting tweeter, ensuring a wide dispersion of sound, making it perfect for larger rooms. The speaker’s high sensitivity rating allows it to deliver audio with great clarity even at lower volumes.

Similar to the S-IC891A, the S-IC691A is another excellent in-ceiling option that features a 6.5-inch woofer and a 1-inch tweeter, striking a balance between size and performance. This model excels at providing immersive sound without taking up valuable floor space, catering specifically to those who wish to enjoy high-quality audio in a discreet manner.

The S-IW891 is designed for those who need more robust in-wall options. Equipped with dual 8-inch woofers and a pivoting 1-inch tweeter, it is capable of producing powerful sound that can fill larger rooms. Its rugged construction and moisture-resistant materials make it suitable for various environments, including bathrooms and outdoor patios.

Lastly, the S-IW691L offers a unique combination of style and performance. Featuring dual 6.5-inch woofers and a 1-inch tweeter, this model is engineered for optimal sound reproduction and clarity. Its low-profile design makes it a superb choice for aesthetic-conscious users who desire quality sound without intrusive equipment.

Each of these Pioneer models is characterized by their robust construction, stylish designs, and advanced audio technologies. Together, they offer a range of solutions for audiophiles looking to enrich their sound experience in any setting.
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