Why are open baffle speakers praised for sounding 'natural'?

Many of our speaker owners have shared feedback noting that their speakers sound natural, and they haven’t needed room treatment. Why is this?

In general, boxed speakers tend to be more ‘directional’ than open baffle speakers. They’re often designed in anechoic chambers, measured at a specific point (1m from the drivers), and voiced to achieve a particular sonic signature at that target point. The sense of ‘space’ and sonic ambiance in boxed speakers comes from the design of the enclosure. However, once placed in a real room—not an anechoic chamber free of reflections—the room’s natural ambiance can clash with the box’s sonic signature, creating a need for room treatment.

In contrast, open baffle speakers have no box, and their driver sizes are proportionate to the room. Their ambiance aligns with the natural acoustics of the room, so they work with the room’s acoustics rather than against it.

Moreover, our brains are accustomed to the acoustic ambiance of the room. So, when open baffle speakers are placed in a room, they sound ‘natural’ because they play along with the room’s existing acoustics. For us, this is natural sound—the sound we’re inherently used to.

As one of our customers put it: “I saw someone mention how they seem to play with the room rather than fight against it, and I have found that to absolutely be true.”

Open baffle speakers likely come closest to reality in how they reproduce recorded music. However, while this concept is familiar in pro audio, the home audio industry has faced a few major challenges with it.

If you look at most guitar and keyboard amplifiers, you’ll notice they’re vented, meaning open at the back, where you can even see the magnets of the drivers. Even the legendary Fender Rhodes electric piano sits on a large box that serves as an open-back speaker—meaning the sound of the Fender Rhodes comes from a large, semi-open baffle speaker.

With boxed speakers, the cabinet significantly impacts the sound, allowing designers to shape the sonic signature using the box and the damping materials inside it. In open baffle designs, there is no box, so this level of control isn’t possible. What you’re hearing is the direct sound from the drivers, without any cabinet influence on the electrical signal coming from the amp through the crossover to the drivers. This setup requires crossover components and drivers of high audio quality, specifically designed for open baffle geometry. No cabinet or damping materials are there to mask or compensate for the component quality or their sonic characteristics.

Another factor is size. Boxed speakers allow for relatively big and deep sound from enclosures that aren’t proportionally large. In open baffle designs, however, the drivers need to be large and capable enough to create a sense of sonic presence, especially in low and even mid frequencies.

Lastly, open baffle speakers have an inherent transparency—since they’re open, you can see all the components. This transparency becomes problematic given the high markup in the speaker industry, with the ratio between component cost and retail price often between 7 and 15 due to substantial dealer and distributor margins. In many high-end speakers, low-cost, low-grade components are concealed within impressive, polished cabinets. With open baffle designs, however, there’s nothing to hide, making it difficult for the industry to justify inflated prices.

Creating a feeling of deep bass requires what’s called “air movement.” In typical boxed speakers, this is achieved by compressing air inside the cabinet and releasing it through a narrow port tuned to a specific frequency, usually between 40 to 60 Hz. This does create a sensation of bass, but the result is often a “one-note” and sometimes “boomy” sound. In open baffles, the feeling of deep bass is achieved by using large, capable woofers specifically designed for open baffles, not boxes. These woofers produce bass without the need to compress air in a cabinet. In this case, size and design truly matter.

When woofers and speakers are properly designed, open baffle speakers not only convey deep bass, but they also reproduce bass exactly as it was recorded. The bass sounds fast, accurate, and detailed, with all its inner nuances—without needing to force compressed air through a fixed-size port to simulate deep bass.

Finally, so-called “bass cancellations” depend heavily on the design of the woofers and the speakers. A complete mathematical and physical model addressing potential cancellations would consider continuous sound dispersion in 360 degrees across the entire frequency range, within a real acoustic environment. This model is complex and goes far beyond the typical, oversimplified models showing a few directional arrows. Simplified models that claim back-wave cancellation of the front wave are incomplete and, therefore, don’t accurately represent physical reality.

I once had a visitor at a show who asked me how we overcame bass cancellations. Tired of answering this question repeatedly, I asked him, “What cancellations are you talking about? Do you hear anything missing in the bass?” He replied, “No, I don’t hear anything missing; that’s why I’m asking how you overcame these cancellations.” As we talked, I glanced at his name tag and realized—he was one of the people who had published an article years ago about bass cancellations in open baffle speakers, which had become popular among the DIY community and spread widely online.

Realizing who I was speaking to, I gave him a complete answer with a solid physical explanation, emphasizing that the models supporting bass cancellation claims are very partial and oversimplified. He agreed, acknowledged I was correct, and even complimented us on our work. I then asked if he would publish a correction to his widely-read article. His response was a polite smile… nothing more. This story speaks for itself and tells it all.