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Technology

The flat frequency and time-coherent response of a high-quality active loudspeaker is the result of the combined effect of the responses of crossover filters, power amplifiers and drivers in a single loudspeaker enclosure. Sottovoce Audio studio monitoring systems are developed with the following techniques:

Directivity control

Directivity control technology studies the propagation of a high frequency wavefront under some boundary conditions like a tweeter front plate. Our investigation in this field results in a proprietary design of a high frequency waveguide optimized for a smooth and controlled directivity pattern. Furthermore, the reduction of cabinet edge diffraction, the increase of tweeter power handling and the minimization of early room reflections are benefits of a controlled directivity design.

Closed box design

We know that low frequency transient response is superior in closed box enclosures than in other types, like vented and transmission line enclosures. This is translated in a precise, non-resonant and natural sound reproduction at low frequencies. Furthermore, the damped, low frequency alignments found in our closed enclosure designs benefit from a better in-room integration. Sottovoce Audio closed box designs feature high power, professional low frequency transducers to achieve a non-compromise, superior sound performance.

Ported box design

The bass reflex principle increases the woofer’s low frequency extension and efficiency from a given cabinet. The outputs from the driver and the port combine for generating the total radiation of the ported enclosure. When high system efficiency and high quality sound reproduction are needed, Sottovoce Audio uses advanced computer simulation techniques to reach for precise and optimized ported box designs.

Digital crossovers

Audio crossovers allow to split the audio signal into separate frequency bands that can be separately routed to specific transducers optimized for a particular frequency band (high, mid, low or sub). Sottovoce Audio digital active crossovers include additional signal processing, such as driver protection, delay, gain adjustment and equalization. Among the benefits of this technique we can find an increased flexibility and precision to adjust and fine tune each output frequency and phase responses for the specific drivers used.

Active amplification

Digital and electronic crossovers allow to split the audio signal into separate frequency bands before they are routed to individual power amplifiers, each of them directly connected to a specific transducer which is optimized for a particular frequency band. In a typical 2-way loudspeaker system, we need two power amplifiers (one for the woofer and one for the tweeter). This active design offers several benefits for design, operation and performance:
– The power amplifiers are directly connected to the speaker drivers, maximizing the control exerted by the power amplifier’s damping on the driver’s voice coil. This may improve the transient response of the system.
– Each loudspeaker driver has its own power amplifier. This isolates each one from the drive signals handled by the other drivers, reducing intermodulation distortion and overdriving problems.
– In the absence of a passive crossover, no loss between amplifier and driver units results in maximum electric and acoustic efficiency.
– All loudspeakers are delivered as a factory optimized system (electronics, amplifiers, drivers and enclosure), allowing to a reduction in size while improving the overall performance.

Loudspeaker protection

The loudspeaker protection feature employs digital signal processing and electronic filtering to preserve loudspeakers from being driven with very, very low frequencies. These may generate large diaphragm excursions which can mean an increase of distortion or even a mechanical damage to the drivers. This loudspeaker protection is implemented as high order filters for high and mid frequency drivers, and as a subsonic filter for low frequency drivers. Furthermore clipping detection and output limiting may be implemented in our active systems, to avoid them from being driven beyond their limits.

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