The VARI-Q project
was conceived to solve the problem of covering a rectangular space from
an oblique angle. Typical church sanctuaries and school auditoriums are
rectangular in shape and the most likely place for the speaker is hanging
overhead facing down at an oblique angle. The front row is wide at the
bottom of the pattern but close to the speaker. The back row is narrow
at the top of the pattern but far from the speaker. This creates a trapezoid
shaped area from the point of view of the speaker. The WRIGHTVARI-Q horn solves the coverage pattern problem by shaping the pattern
wide at the bottom and narrow at the top, AND the distance problem by sending
12dB more sound to the back of the room to compensate for the "inverse
square" law. [Sound dissapates at a rate
of 6dB per double the distance.]
VARI-Q Horn
Features
Flat Front
Constant Directivity
Oblique Projection Pattern
Directed Coverage
Cabinet Designs
WRIGHT
Vari-Q Speaker System
Vari-Q Specification Sheet
2"
HF driver & 600 watt 15" woofer make a dynamic system capable
of covering medium to large rooms as long as they are rectangular lengthwise.
Three vertical coverage angles for longer or shorter
rooms OR rooms with balconies.
Available with internal passive crossover or external
crossover passive or electronic.
JBL4660
Speaker System
JBL4660 Specification Sheet
This
speaker was in limited production in the 70's & 80's but was discontinued.
Weaknesses were low power handling and a small 1" HF driver which
limited applications to small rooms. JBL spent a lot of time and money
on this one but never promoted it properly.
This cabinet may be retrofitted with WRIGHT Vari-Q horns
ALTEC
Vari-Intense Speaker System
VI-15 Specification Sheet
This
speaker is still in production under the Electro Voice name but it suffers
from low power (even less than the JBL) and the HF horn is too small to
really be effective. Plus the latest version has a perforated metal grille
which severely limits dispersion.
I only mention it here because it purports to solve the
same problems but the low power and odd shape make it very limited in usefullness.