Acapella Violon 2001 Instruction Manual - Optimising Imaging Accuracy
Optimising imaging accuracy
Control of monophonic reproduction
The meaning of this control is to optimise placement of the loudspeakers
relative to your living room. Without proper adjustment you won’t be
able to localise voices or instruments precisely in the imaginary room
which is reproduced by the loudspeaker. Only a correct mono calibration
enables a perfect stereo reproduction. Please do not connect the ion tweeter
while making this setting. Avoid eventual short circuits. Switch your
amplifier to mono, or still better, use a monophonic CD. Go back to your
listening area. When reproducing voices or instruments, attention has to
be paid to the direction they are coming from. Supposing that reproduction
is out of balance and tending to the left, you can either toe-in the right
loudspeaker or toe-out the left one. Please consider that soundstage and
imaging can shift to the front or to the back according to the change
of the loudspeaker’s position. Please try to make changes of the loud-
speaker’s position symmetrically. Always vary only a few millimetres,
and if necessary, to the front or to the back. Optimisation is accomplished
when the music can be heard right between the loudspeakers. Finally, you
can control the loudspeakers with a spirit level and fit them with the base
screws. To make these adjustments, loosen the lock nut of the setting
screw first. Do not forget to tighten the lock nuts towards the bottom
of the cabinet again.
Fine adjustment of the ion tweeter
Switch off your amplifier and connect the ion tweeter. For the following
settings use music with a good proportion of higher frequencies (hi-hats,
still mono).
Do not alter the position of the loudspeaker anymore!
As described above, pay attention to the direction the music seems to
come from. Adjust the level of the ion tweeter (the louder one determines
the direction) so that even the softest hi-hats are always coming at you
from the centre. Optimum setting has been obtained if you can localise
the sound source in the size of a football right between the loudspeakers.
Music seems to be reproduced by a Center loudspeaker. In case of a
change of the level of the higher frequencies, adjust it synchronously
left and right by considering the pencil mark. In this way, you can
re-establish the balance between mid and high frequencies.