PMC twotwo.5 User Manual page 17

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, such as computer screens. Excessive nearfield reflections
from these kinds of objects will blur the stereo imaging significantly, and may introduce
unwelcome colouration of the sound.
TIP 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 optimising the speaker height, the acoustic axis of all twotwo cabinets is midway
between the HF and LF drivers. This axis should be level with the listener's ears.
TIP 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.
Speaker Orientation
twotwo series monitors are designed to be used either in upright
(portrait) or horizontal (landscape) orientations without affecting
the tonal or stereo imaging performance. This also allows their
use as a low profile centre channel in surrounded systems. For
this reason, twotwo series monitors are 'handed', and in normal
applications the tweeters should be placed on the 'inside' of the
listening triangle, as these illustrations demonstrate.
left
left
right
right