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A musical waveform is a complex overlay of frequencies, amplitudes, and phase relationships. With current
technology, no single transducer can reproduce the full range of music at realistic sound pressure levels
and maintain consistent dispersion. The only practical solution to this problem is a multiple driver array,
but multiple drivers introduce their own set of problems, chief among them the challenge of preserving the
precise time relationships of the musical waveform. The fact is, misalignment of the drivers by small
fractions of an inch will audibly degrade transient performance, soundstage height, width, and depth, as
well as introduce tonal anomalies that destroy the otherwise convincing "presence" of an instrument or a
singer's voice.
The key to solving this problem lies in the vertical alignment of the various drivers in an adjustable
modular array so that each driver's waveform propagation "matches up" with its neighbors' in such a way as
to create the sonic equivalent of a single point source.
Wilson's patented Adjustable Propagation Delay has long set the standard for precise driver positioning in
order to ensure correct propagation alignment for a wide range of listening locations. Alexandria took this
technology a step further with the introduction of Aspherical Propagation Delay. Not only can each driver
module move forward and back in the time domain, but each module rotates on its polar axis to achieve optimal
dispersion for any chosen listening postion.
In conventional systems, drivers are mounted in a flat baffle such that each driver is positioned at a
different distance in relation to the listener. Thus, energy from the tweeter arrives at the listening
position in advance of the midrange, which in turn arrives before bass generated by the woofer. The problem
of achieving both time-domain coherence and optimal driver dispersion is only exacerbated by larger speaker
systems. Most speaker designers simply ignore this measurement.
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With Aspherical Propagation Delay. Alexandria's driver modules adjust to achieve optimal driver dispersion
for nearly any size room and for any chosen listening position. The Alexandria and now the MAXX Series 3 are
the only loudspeakers to utilize these combined innovations.
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