Equalisation/Placement - Tannoy VS10 BP Owner's Manual

load conditions. A loudspeaker system is highly reactive and with transient signals
it can require more current than the nominal impedance would indicate.
Generally a higher power amplifier running free from distortion will do less damage
to the loudspeaker than a lower power amplifier continually clipping. It is also
worth remembering that a high powered amplifier running at less than 90% of
output power generally sounds a lot better than a lower power amplifier running at
100%. An amplifier with insufficient drive capability will not allow the full
performance of the loudspeaker to be realised.
It is important when using different manufacturers' amplifiers in a single installation
that they have very closely matched gains, the variation should be less than +/-
0.5dB. This precaution is important to the overall system balance when only a
single active crossover is being used with multiple cabinets; it is therefore
recommended that the same amplifiers be used throughout.
6.

Equalisation/Placement

The VS10BP is designed to need no equalisation or correction to overcome
system limitations. As a result, it will only need equalisation to compensate for
difficult acoustic environments.
Excess equalisation can reduce system headroom, and introduce phase distortion
resulting in greater problems than it cures. If equalisation is required then it should
be applied gently and smoothly. Violent equalisation will be detrimental to the
overall sound quality.
The frequency band over which a subwoofer operates is essentially omni-
directional, therefore efficiency of the VS10BP may be further enhanced if the unit
is placed against a wall, where the radiation in the forward plane will be doubled
due to the addition of the reflected rear directed energy, and a 3dB increase in
sound pressure will occur. If another boundary is introduced, say a floor, then the
effective radiation space is halved again, resulting in a further 3dB lift, and if
placed in a corner, once again the sound pressure level will increase by a further
3dB.
The compact dimensions of the VS10BP allow the VS10BP to fit into small
spaces. A unique feature incorporated into the VS10BP further enhances this
flexibility;
The Bass Ports on the VS10BP can be moved onto the other face of the cabinet
as shown below. Simply remove the blank plates and Bass ports and swap
positions. Each chamber in the enclosure utilizes a different length bass port. To
avoid placing the wrong Bass port in the wrong chamber the holes in the
enclosure are 'Keyed'.
The features described above allow the VS10BP to be placed in any orientation.