ATL IB2S-A, User Manual, Page: 17 / 46

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When initially positioning the loudspeakers, ideally they should be located at two of the three
points of an equilateral triangle, with the listener at the third. If the monitors are spaced too far
apart the stereo image will be wide but central definition will be impaired. Use a well recorded
vocal track to judge the ideal placement.
Attention should be paid to the effect of reflective surfaces such as side walls and objects in
close proximity to the loudspeakers, as excessive nearfield reflections will blur the stereo imaging
significantly and may introduce unwelcome colouration of the sound.
Place the speakers so that their front baffles are well forward of any objects placed between
them, such as computer display screens.
With regard to vertical placement, the acoustic axis of the IB2S-Active master cabinet is midway
between the HF and MF drivers. This axis should be level with the listener’s ears.
To prevent vertical room modes from causing
boominess, do not position the speaker such that
the bass driver is at an even proportion of the room
height, such as a half or a quarter.
Plinth modules can be used to raise the cabinets
to help tune the bass response with respect to the
room boundaries. Two possible mounting options are
illustrated opposite.