PMC AML2, Руководство пользователя

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One source of sound
at the crossover point
Two sources of sound
at the crossover point
Positioning (Cont.)
Speaker Orientation
The AML2 is designed to be used upright to ensure optimum stereo imaging, tonality and
amplifier cooling.
Around the crossover frequency both drive units are inherently reproducing the same audio
signal (although PMC designs employ steep crossover filters which minimises this), and so there
are inevitably two sources of sound. When the drive units are aligned one above the other the
two wavefronts emanate from one vertical plane and both will arrive at the listener at the same
time, providing accurate stereo imaging and minimal colouration. This is illustrated in the left
diagram below.
In contrast, if the speaker is mounted horizontally the wavefronts from the two drivers radiate
from two horizontally spaced points. This results in different arrival times at the listening position for
sound from each driver, producing colouration and vague stereo imaging (right diagram) below.
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