What is Flat Core Speaker (FCS) Technology?

Flat Core Speaker (FCS) Technology is the next-generation speaker technology made by replacing the major components of the speaker with those that are flat, in an attempt to create an ideal speaker as defined in our WHITE PAPER (please contact us to get an access). The FCS technology achieves the even force distribution along the diaphragm by adopting flat components of the speaker, and thus reproduces the ideal sound.

As a starter, please watch the video below to listen to Christian Femrite, our VP of Engineering, who explains how it works and plays a demo of our speaker prototype.


Structure of Flat Core Speaker Technology

Unlike the traditional cone-shaped structure, the FCS technology utilizes flat major components:

  • Flat Diaphragm

  • Flat Voice-Coil

  • Flat Magnet(s)


1. Structural Difference

As seen in the Figure below, the conventional cone-shaped structure speaker uses the circular voice-coil to move the part of the diaphragm, which accompanies inherent structure problems such as partial vibration. The FCS technology, on the other hand, uses a flat voice-coil which distributes the force evenly along the diaphragm, which not only solves the structural problem but also yields superior sound performance.


2. Modular Design

The FCS also adopts a unique rectangular structure which allows for the modular design implementation, which could substantially increase the sound and space efficiencies in ways that were not possible previously.


Key Features and Applications

1. Wider Coverage


Having a planar design, Flat Core Speakers produce sound wave that has a better coverage than that of the traditional cone-shaped speakers. This results in superior sound performance as the sound now travels in a near-perfect planar wave as it originates as a line-source reproduction instead of a typical point-source reproduction.


2. Efficient Form Factors

Through the adoption of the efficient structure and a modular design that is unforeseen in the traditional technology, the FCS can achieve the following key metrics when compared with equivalently-sized traditional speakers:

  • Substantially thinner form factor (simpler design)

  • Lighter in physical weight (use of less material)

  • Increased energy efficiency (increased magnetic flux)

  • Reduction in material uses (helps environment)

  • Acoustically superior sound performance

  • Full-range coverage (20 Hz - 20 KHz)

  • Better heat dissipation

  • Reduction in defect rates in manufacturing

  • Universal applicability (compatible with any existing amplifier)


3. Structural Flexibility

Due to its unique form factor, FCS technology allows speakers to be made thin, light, and into any flexible shape. This advantage allows the FCS to adopt various designs to meet the design needs of current-day products. Furthermore, the speaker itself can be made into the state-of-art design which can be used as part of the interior design. The FCS can also be made into any shape and form from a curved angle to a sharp angle, including but not limited to the following designs: rectangle, triangle, circle, star, heart, spade, etc.


4. High Fidelity

The existing cone-shaped speaker adopts crossover which segments different frequency ranges in order to provide high-quality sound. This segmentation often results in the loss of mid-range sound due to the diffraction and interference. However, the FCS can reproduce a wide range covering 20 Hz to 20 KHz without the need for a crossover, which allows the FCS to reproduce the mid-range sound, which is the frequency range noted for the human voice, with high fidelity. Furthermore, because the sound pressure is controlled evenly throughout, the sound can remain relatively constant regardless of the distance one is standing from the source. This structural advantage essentially allows for the paradigm shift from a point-source sound reproduction to a line-source sound reproduction.


5. Wider Stereo Range

Stereo Image refers to the system that can recognize the locations and the sound of different instruments - whether it is a human voice or the sound of the instrument - during the sound recording. The conventional cone-shaped speaker had its limitations on the space in which it can reproduce a perfect stereo sound. Since the FCS, on the other hand, produces a near-plane wave, which allows for the constant sound reproduction regardless of the distance from the sound source, it can realize an optimal sound experience in a much larger area.


6. Reduced Echo

Because The conventional cone-shaped speaker’s volume decreases inversely to that of the square of the distance, the microphone, when located closer to the sound source, experienced a frequent and problematic echo/feedback effect. On the other hand, the FCS realizes a near-plane wave and has even reproduction of the sound; this echo effect can substantially be reduced, and is ideal to produce high fidelity sound in places like karaoke where the space is limited and the distance between the microphone and the speaker is limited.


7. Strong Performance on Low-End Frequencies

In order to produce a low-end frequency sound of 50Hz, the cone-shaped speaker requires a large subwoofer such as a 12-inch subwoofer. Since other planar speaker technologies like the NXT or the Film Speaker cannot produce low-end sound, they still required a separate cone-shaped subwoofer to supplement their sound. The FCS, however, can linearly move a large volume of air in a plane form, and can achieve enough output to produce low-end frequency range, it is ideal to produce the low-end sound. Therefore, the FCS can replace a bulky and heavy subwoofer with a substantially thinner and lighter unit.


8. Applications & Use Cases

Consumer Electronics

  • Could be used to produce high fidelity sound while maintaining a small form factor

  • Cell-phone, laptop, tablet, navigation, etc.

Wearable Devices

  • Ideal for the audio system within the wearable devices

Home Audio

  • Best fit for the ultra-thin products

  • LCD/LED/OLED TV, Home Theater, Soundbars, etc.

Automotive, Marine, Aerospace Internal Speakers

  • Ideal for the use in space constraints where the weight and size reductions are required

  • Automotive industry is especially ideal as the FCS could be installed along the roof of the vehicle, not to mention substantial weight reduction

  • Repositioning of speaker locations are also desired for the uses in Marine industries: boat, yacht, etc.

Home, Apartment, Hotel Interior Speakers

  • Speakers can be readily implemented in the existing rooms and walls without having to drill in the holes in the wall

Public Broadcast, Concert Hall, Large Stadium Speakers

  • Uses in high output speakers are desired as the size and weight could be substantially reduced, which could help in the portability


Comparison Against Existing Technology

Conventional dynamic loudspeakers have some strengths which have pushed it to where it is today, but also some weaknesses that leave more to be desired. Though this is a non-exhaustive list, a couple of each are mentioned here.

  1. Strengths

    1. Cost Effectiveness: Over the years, speakers have been developed with practically any material imaginable ranging from styrofoam to glass. Manufacturers have arrived at cost-effective ways to provide high-quality sound.

    2. Diaphragm and Cone Stiffness: Though there are still surface modes which give rise to nonlinear distortion, the cone-shaped design certainly provides a degree of stiffness due to its concave structure and generally highly compressible air volume.

  2. Weaknesses

    1. Sound Dispersion: Many of the designs on the market focus on the on-axis frequency response as the highest authority on the performance of a speaker. It isn’t always the case that a listener is perfectly stationed on the perpendicular axis from the speaker, so there are often issues that arise with high frequency sound distribution around a larger room.

    2. Incomplete Frequency Response: There aren’t many, if any, individual drivers that independently can reproduce the entire audible spectrum efficiently. There are a number of partial solutions such as built-in crossovers with 2-way and 3-way systems, waveguided enclosures, and even coaxial drivers, but they all add further complexity.

The FCS is not the first to adopt a planar diaphragm for the speaker. In fact, there have been other attempts over the past decades. While these previous attempts succeeded in creating speaker drivers that are thinner, they could not replace the existing cone-shaped speaker drivers due to their high cost of manufacturing and lack of scalability.

Although there have been other speaker structures invented, we're the first to be in a position to overtake the market dominance of the original speaker.

Please feel free to watch this video for a more in depth explanation of how the tech works and how it compares to other existing technologies.


Resonado ushers in an iconic change with the potential to foster innovation across every industry you can think of: from alarm clocks, to cars, to planes, to concerts, to entire stadiums. 

In the midst of rapid technological development, conception of technology varies greatly among different generations. Take the save icon or the call icon for example. Our generation hardly knows what a floppy disk is or even a dial phone. It's time to introduce innovation to the sound industry to where the next generation will hardly know what a cone-shaped speaker is.