Frequency response

Panphonics Audio Element reproduces the whole frequency range on the same unit without separate crossover filters. There promises a clear and uncolored sound with an excellent transient response as the mass of the moving diaphragm is extremely small and there is no influence from a moving coil or cone inertia effects. In other words, Panphonics Audio Element has a large area coupling with surrounding air. Result is a smoother response that provides better sounds.

Frequency response may also be extended to lower frequencies by using larger areas. This can be constructed simply by using multiple Audio Elements. With plane wave sound field the acoustic coupling of elements works perfectly and there is no problem of deconstructive interference, which is a common issue with multi-way speakers.

"Deconstructive interference" of sound field occurs when audio signals from multiple sound sources overlap and cancel one another out. It creates dead spots in the wave field. When designing a loudspeaker with multiple sound sources there will always be compromises with a box design, cone element properties, and frequency range where to place cross-over areas.

However, when using plane wave transducer a sound designer has a greater freedom and simplicity in practice. Sound is always perfect for listeners in front of plane wave transducer, regardless of the distance from the source, be it  just 1 meter away or 100 meters away. This also allows listeners to move freely in front of the transducer without experiencing a change in audio quality - achiving a new, amazing listening experience while minimizing the disturbance to surroundings. This is a very practical solution and is only possible with plane waves. Using headsets is the only other option to achieve this.

One Panphonics Audio Element (600x600mm) exhibits a flat (±3 dB) frequency response starting from 300 Hz. For low to low-mid frequencies, an acoustical short circuit is formed between the opposite surfaces of the element as the front and rear sound pressures cancel each other out at the edges of the element. Accordingly, the frequency response of the element drops at low frequencies.
 
A part of this phenomenon can be explained with a so-called "baffle step effect" - this is an increase in output from a loudspeaker as the size of the baffle becomes significant in terms of the wavelength of sound for a range of frequencies. Therefore, a surface area influences the low frequencies and also the sound pressure level - when adding a second 600x600mm Audio Element the middle and the high frequency output increases by 3dB as a result of doubling the radiating surface area, while the increase of low frequency output reaches +18dB.