ITASCA, ILLINOIS — Knowles has introduced a new hybrid driver architecture designed for over-ear headphones, extending the use of balanced armature (BA) technology beyond its traditional applications in hearing aids, in-ear monitors, and true wireless earbuds.
The new design combines a conventional dynamic driver with dual balanced armature drivers, with the goal of improving high-frequency reproduction while maintaining the low-frequency performance associated with dynamic drivers. According to the company, internal testing demonstrated enhanced output and detail from approximately 6 kHz to 40 kHz compared with a standalone dynamic driver.
The announcement reflects a broader trend toward hybrid acoustic designs that have become increasingly common in premium true wireless earbuds, where multiple driver types are used to optimize performance across different portions of the frequency spectrum.
Bringing Hybrid Audio to Over-Ear Headphones
For decades, most over-ear headphones have relied on a single dynamic driver to reproduce the full audible frequency range. While dynamic drivers are well known for delivering strong bass response and broad frequency coverage, reproducing both deep low frequencies and detailed high-frequency content with a single transducer requires engineering tradeoffs.
Hybrid designs seek to address those limitations by assigning different frequency ranges to specialized driver technologies. In many premium earbuds, dynamic drivers handle bass and lower frequencies, while balanced armature drivers reproduce midrange and treble frequencies.
Although this architecture has become increasingly common in in-ear products, it has seen limited adoption in over-ear headphones. One reason has been the assumption that balanced armature drivers perform best when positioned close to the ear canal.
In over-ear designs, the greater distance between the driver and the listener’s ear has traditionally raised questions about whether BA drivers could provide meaningful high-frequency benefits.
Knowles says recent work in emerging product categories—including open-ear audio devices and smart glasses—demonstrated that balanced armatures can maintain strong high-frequency performance even in more open acoustic environments, leading the company to explore their use in full-size headphones.
Dual Balanced Armatures Complement Dynamic Driver
The newly introduced architecture places two balanced armature drivers in front of a traditional dynamic driver, directing high-frequency sound toward the listener while allowing the dynamic driver to continue reproducing bass and lower frequencies.
According to Knowles, the compact size of balanced armature drivers enables the hybrid system to fit within existing over-ear headphone designs without significantly increasing weight or altering overall form factors.
The company says the approach allows manufacturers to incorporate hybrid driver technology without requiring major industrial design changes.
Growing Adoption of Hybrid Driver Designs
Hybrid acoustic architectures have become increasingly prevalent across the consumer audio industry as manufacturers seek to improve clarity, instrument separation, and detail retrieval while preserving bass performance.
Balanced armature technology has expanded well beyond its traditional role in hearing aids and professional in-ear monitors. In recent years, manufacturers including JBL, JLab, Baseus, Status Audio, Edifier, and others have incorporated hybrid driver architectures into premium true wireless earbuds and open-ear audio products, reflecting broader industry interest in multi-driver acoustic designs.
The introduction of a hybrid architecture for over-ear headphones represents the latest extension of that trend. As consumer expectations continue to rise, manufacturers are exploring new ways to improve sound quality without compromising comfort, battery life, or industrial design.
Knowles says its new platform is designed to provide headphone manufacturers with a compact hybrid solution that can fit within existing over-ear headphone form factors while enhancing high-frequency performance. While commercial products incorporating the architecture have not yet been announced, the company believes hybrid driver designs could become more common in future generations of premium over-ear headphones.
About Knowles
Knowles Corporation (NYSE: KN) is a market leader and global provider of advanced micro-acoustic microphones and speakers, audio solutions, and high-performance capacitors and RF products, serving the consumer electronics, communications, medtech, defense, electric vehicle, and industrial markets. Knowles uses its leading position in SiSonic™ MEMS (micro-electro-mechanical systems) microphones and strong capabilities in audio processing technologies to optimize audio systems and improve the user experience across consumer applications. Knowles is also a leader in hearing health acoustics, high performance capacitors and RF solutions for a diverse set of markets. Knowles’ focus on the customer, combined with unique technology, proprietary manufacturing techniques, and global operational expertise, enables it to deliver innovative solutions at scale across multiple applications. Founded in 1946 and headquartered in Itasca, Illinois, Knowles is a global organization with employees in over a dozen countries. For more information, visit knowles.com.
Source: Knowles
