Optimal Audio Cuboid 8 Manuel utilisateur
Loudspeakers
Cuboid
Loudspeaker
USER GUIDE
>
The Optimal Audio range of
compatible audio zoners, ampliers
and loudspeakers are designed to
work together simply and effectively.
Our quick start guides will take you
through the simple connection and
set up procedure.
Cuboid consists of a series of full-
range, high-powered loudspeakers
designed to deliver great sound
at an affordable price. When used
in conjunction with the rest of
the Optimal Audio eco-system
Cuboid will surprise you with its
performance, even coverage and
professional aesthetic.
This Quick Start Guide will help you
get your Cuboids rigged, positioned
and connected correctly.
Congratulations on your choice of Optimal Audio
for your latest sound system installation.
2/16
Cuboid
Loudspeakers
Loudspeakers
USER GUIDE
© 2021. Optimal Audio Group Ltd. (v1.1)
Introduction
Overview
Wall mounting
Horn rotation
Ceiling
mounting
Connecting up
Matching
speakers and
amps
>
<
Safety
information
Cuboid 8, 10, 12 and 15 are all passive, full-range, 2-way loudspeakers.
This means that they have a high frequency driver loaded on to a horn, giving
increased efciency and directivity, and a low-frequency cone driver.
The loudspeaker is fed with a full-range output from an amplier and an internal
cross-over network divides the signal between the high and low frequency
drivers.
Rotatable high frequency horn, low
frequency driver, bass reex port,
M8 xings
3/16
Cuboid
Loudspeakers
Loudspeakers
USER GUIDE
© 2021. Optimal Audio Group Ltd. (v1.1)
Introduction
Overview
Wall mounting
Horn rotation
Ceiling
mounting
Connecting up
Matching
speakers and
amps
>
<
Safety
information
Cuboid can be mounted on a wall in either portrait or landscape mode using the
appropriate wall bracket or suspended from a ceiling with the appropriate
U bracket.
The above table lists the correct wall bracket for each Cuboid model, along with
the combined weight of the loudspeaker and bracket.
It is critical that the structure to which Cuboid is to be mounted is suitable
for taking the weight of the loudspeaker/bracket assembly.
It is highly recommended that a secondary safety xing be tted. This can
be achieved using a suitable rated M8 eyebolt and rated safety chain or steel
wire rope.
Cuboid Model Wall bracket Combined weight U Bracket Combined weight Eyebolt tting
Cuboid 8 A 10.64kg A 13.0kg M8 x 16
Cuboid 10 B 17.26kg B 20.0kg M8 x 21
Cuboid 12 B 21.26kg C 25.5kg M8 x 21
Cuboid 15 C 31.35kg D 35.0kg M8 x 19
4/16
Cuboid
Loudspeakers
Loudspeakers
USER GUIDE
© 2021. Optimal Audio Group Ltd. (v1.1)
Introduction
Overview
Wall mounting
Horn rotation
Ceiling
mounting
Connecting up
Matching
speakers and
amps
>
<
Safety
information
Once loudspeaker position has been
decided, afx wall section of Wall Bracket
(A,B or C depending on Cuboid model)
securely to a suitable wall mounting point
Remove M8 xing bolts from the rear
of the loudspeaker cabinet
Position loudspeaker cabinet
section of Wall Bracket over the
four M8 mounting points and
secure with the four bolts from the
back of the cabinet
Optional Wall Bracket mounting positions
enable greater down-tilt, using the lower
four M8 bolt position, or the loudspeaker
can be mounted in landscape mode by
rotating the bracket as shown:
Wall Mounting – Portrait or Landscape
5/16
Cuboid
Loudspeakers
Loudspeakers
USER GUIDE
© 2021. Optimal Audio Group Ltd. (v1.1)
Introduction
Overview
Wall mounting
Horn rotation
Ceiling
mounting
Connecting up
Matching
speakers and
amps
>
<
Safety
information
Horizontal Fixings
Vertical Fixing
Grub Screw
Lift loudspeaker into position making sure that
the two halves of Wall Bracket line up – the
adjustable bolt sits into the two ‘U shaped’ cups
in the wall section of the bracket
Secure the assembly with the xed bolt in the
lower hole in the bracket – this provides the pivot
for angling the loudspeaker. Adjust the grub
screw to x the down-tilt angle
Once the loudspeaker is in position and you are
happy with the angle adjustments, tighten all
xings as shown to lock the cabinet in place.
Horizontal xings Vertical xings
Grub screw
6/16
Cuboid
Loudspeakers
Loudspeakers
USER GUIDE
© 2021. Optimal Audio Group Ltd. (v1.1)
Introduction
Overview
Wall mounting
Horn rotation
Ceiling
mounting
Connecting up
Matching
speakers and
amps
>
<
Safety
information
When installing horn loaded loudspeakers, it’s worth taking a moment to
understand how the loudspeaker projects sound and how to get the best
coverage in your venue by careful aiming.
The above table lists the coverage angles of the high-frequency horns in the
Cuboid range. These gures are quoted using the centre axis of the horn as 0°
and measuring the angle off centre where the sound pressure level (SPL) drops
by 6dB. The results given reect horn symmetry, 90° = 45° horizontally off axis
both sides of centre.
These specications refer to the loudspeaker ex-factory. With the loudspeaker in
portrait, the horn is tted to deliver coverage as shown in the table above. If you
intend to mount your Cuboid in landscape mode (when suspending horizontally
from ceiling for instance), consider rotating the horn as shown in the following
images:
Speaker positioning and aiming
Cuboid Model Horizontal Vertical
Cuboid 8 90° 50°
Cuboid 10 90° 50°
Cuboid 12 80° 50°
Cuboid 15 80° 50°
7/16
Cuboid
Loudspeakers
Loudspeakers
USER GUIDE
© 2021. Optimal Audio Group Ltd. (v1.1)
Introduction
Overview
Wall mounting
Horn rotation
Ceiling
mounting
Connecting up
Matching
speakers and
amps
>
<
Safety
information
Rotating the horn
Remove horn
Replace xings
Rotate horn
Rotate cabinet
2.
4.
1.
3.
8/16
Cuboid
Loudspeakers
Loudspeakers
USER GUIDE
© 2021. Optimal Audio Group Ltd. (v1.1)
Introduction
Overview
Wall mounting
Horn rotation
Ceiling
mounting
Connecting up
Matching
speakers and
amps
>
<
Safety
information
The U brackets A,B,C & D are specically designed for hanging Cuboid from a
ceiling in landscape mode. Fixing the U bracket is a simple process:
• Remove the centre M8 bolt from the top and bottom of Cuboid
• Place the U bracket over the loudspeaker and line up the holes with the centre
M8 bolt hole
• Use the supplied bolts to x the bracket to the loudspeaker
• When the angle is set, x with the supplied locking screw
The coverage specications are useful for informing where the loudspeakers
should be aimed. In any horn-loaded loudspeaker, the optimum output is the
centre axis of the horn where you have maximum level from the system. It
therefore follows that the horn axis should be aimed at the furthest point of the
audience.
Sound level however decreases by 6dB for every doubling of distance. This
means that 96dB at 5m from a loudspeaker will reduce to 90dB at 10m – a
signicant drop in energy.
Ceiling mounting using the U bracket Loudspeaker aiming
25 deg
IDEAL AIMING FOR A 50 DEGREE VERTICAL HORN
HORN AXIS AIMED AT FURTHEST POINT OF COVERAGE
-6dB AIMED AT NEAREST
POINT OF COVERAGE
-6dB REDUCED ENERGY
ON CEILING
9/16
Cuboid
Loudspeakers
Loudspeakers
USER GUIDE
© 2021. Optimal Audio Group Ltd. (v1.1)
Introduction
Overview
Wall mounting
Horn rotation
Ceiling
mounting
Connecting up
Matching
speakers and
amps
>
<
Safety
information
Because of this level drop over distance, in larger rooms it’s well worth considering
additional loudspeakers to counter this effect, maintaining volume and intelligibility. In this
case, it is important that the second row of loudspeakers down the room are delayed to
match the arrival of the sound from the rst pair of speakers, as shown above.
11.40 m
IN THIS EXAMPLE THE ROOM IS TOO BIG FOR ONE
SPEAKER TO BE ABLE TO COVER RIGHT TO THE BACK.
A SECOND SPEAKER IS ADDED AT THE POINT WHERE
THE FIRST AND SECOND CROSS OVER.
THE SECOND IS DELAYED BACK TO THE FIRST USING
THE FORMULA:
distance/speed of sound (334m/s @ 20 degrees C)
IN THIS CASE:
11.4/334 = 0.033 seconds, 33 milliseconds
10/16
Cuboid
Loudspeakers
Loudspeakers
USER GUIDE
© 2021. Optimal Audio Group Ltd. (v1.1)
Introduction
Overview
Wall mounting
Horn rotation
Ceiling
mounting
Connecting up
Matching
speakers and
amps
>
<
Safety
information
Ce manuel convient aux modèles suivants
4
Table des matières
Autres manuels Optimal Audio Intervenants
Manuels Intervenants populaires d'autres marques
Bowers & Wilkins
Bowers & Wilkins 4 Manuel utilisateur
Sonance
Sonance SONOS OUTDOOR Series Manuel utilisateur
Electro-Voice
Electro-Voice EVID FM4.2 Manuel utilisateur
Pioneer
Pioneer XW-HTD630 Manuel utilisateur
Onn
Onn BWA16AA002 Manuel utilisateur
HP
HP GL313AA - USB Speakers PC Multimedia Manuel utilisateur