The time domain
The preservation of time coherence for the signal emitted by a loudspeaker system is a technical subject with implications that still today generate discording arguments and controversy among technicians and designers in the field of electro-acoustics. On the other hand this is a topic extremely important in the fields of acoustics and sound perception. Very few manufacturers take this issue into real consideration, so few that, in this case also, it becomes natural to wonder why. The successful design of a speaker system that is time-coherent does not appear a task so difficult to be achieved from a theoretical point of view but in practice it becomes challenging due to the geometries of the units which are to be taken as design parameters and rigid mechanical conditions. Therefore it becomes increasingly difficult to devise possible simple solutions; the choice of the drivers becomes a decisive factor, with demanding aesthetical conditions for the cabinet design. All this, once added to the lack of advanced knowledge of the problem, induces many to ignore the issue and to deny its very existence, as if the real essence of music was not in the coherent reproduction of musical signals. Excellent amplifiers, sources, converters are often mortified by loudspeaker systems whose poor impulse response is simply inadequate. The objective of the best possible time coherence has always been considered priority by the Albedo team of designers, adopting for this purpose sophisticated filtering networks and an optimized geometrical positioning of the speaker mechanical components, achieving thus a perfect reproduction of musical transients.

Delay effect on acoustical phase measurements.

HL 2.2
Axcentia MKII

The reasons of a choice
The Albedo way in loudspeakers making
What is acoustical phase
The acoustical phase