Amina BackboxCV 345 User manual

Installation Guide BackboxCV
V1.0 August 2013 345/ 300/ 200

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Contents
Packaging / Introduction / Overview
Installation steps 1 + 2
Installation steps 3 + 4
Installation steps 5 + 6
Alignment and plastering preparation - retrofit
patch technique
Alignment and plastering preparation - retrofit
feather technique
Alignment and plastering preparation - full wet
skim
Alignment for patch plastering (drywall)
Alignment for feathered skim (drywall)
Plastering and Decorating
Plastering and Decorating Continued
Warranty Information

Caution: Read before installing this product
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To ensure correct installation, please read this
guide carefully and keep in a safe place for
future reference.
Install this product in a cool, dry, clean place -
away from direct sunlight and heat sources,
vibration, chemical fumes, dust and moisture
(steam).
Do not clean this product with chemical
solvents as this may cause damage to the
finish. Use a clean, dry or damp cloth.
ENVIRONMENTAL:
Please be aware that whilst this product significantly reduces the rearward airborne sound output of an
Amina Invisible loudspeaker, impact borne vibrational energy may still travel some considerable distance
up, down and along the wall or ceiling structure. It is therefore recommended the product be fitted within
acoustically insulated stud walls or ceilings where possible.
Ensure that all installation mounting surfaces
are able to support the weight of the
BackboxCV with that of your chosen speaker.
Do not attempt to modify or repair the
product. Contact your distributor or
manufacturer if it is faulty or damaged in any
wa y.
WARNING:
No attempt should be made to install this product within existing building structures unless you are certain
that no electric cables, water pipes, gas pipes or supporting joists will be cut through.
Saftey Hook:
The BackboxCV is equipped with a tether point if a saftey hook is required to be fitted.

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Packaging
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Introduction
Overview
Thank you for purchasing the Amina Technologies BackboxCV. This product has been designed to
enhance the installation of your Amina Invisible loudspeakers by providing an optimised enclosure for
them to operate in. The BackboxCV provides 17dB SPL reduction from 200Hz and above (-25dB at
1kHz) of an Amina Invisible loudspeaker’s rearward sound output into the wall or ceiling cavity.
The BackboxCV is relatively simple to install and this guide includes step by step instructions on the
correct way to do this in order to align the Amina Invisible loudspeaker for plastering.
CAUTION:
Take care when removing the BackboxCV from the carton.
The packaging for the BackboxCV has been carefully designed to protect the product during transit.
Please retain it in the unlikely event you need to return the product to your dealer or manufacturer.
Please recycle the packaging should you wish to dispose of it.
The BackboxCV outer carton is made up of 80% recycled single wall board.
The BackboxCV is formed from a fully recyclable aluminium enclosure.
Fold out support tabs
Rubber grommet
Speaker mounting lip
Backbox mounting lip
Soundproofing layer
Speaker fixing holes
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BackboxCV installation 02
Check which version of the BackboxCV you
have before following this section
Create 455 x 205mm (17.9 x 8.1”) aperture
(CV200)
Create 405 x 305mm (15.9 x 12“) aperture
(CV300)
Create 455 x 350mm (17.9 x 13.8”) aperture
(CV345)
Using a sharp knife or pad saw, cut an
aperture in your plasterboard wall or ceiling.
Ensure the aperture is created between
supporting joists or stud work.
We strongly advise that joists are not cut to
make space for the backbox. Any activity of
this sort may well influence the structural
integrity of your property.
Important: Double check the size of the
aperture, as this is important further on into
the installation process.
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sharp knife
pad saw
Fitting the BackboxCV
Locate joist work
When you have chosen your speaker
locations, before cutting a hole in the
plasterboard it is important that you locate
the position of the wall studs. Ensure the
spacing between them is at least 5mm
greater than the width of your Amina
speaker for a portrait orientated speaker.
350mm (CV345)
305mm (CV300)
205mm (CV200)
(minimum)
cut a small
hole in plasterboard
to check stud location
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04 Fix BackboxCV and insert insulation
Using 8 drywall screws (4 at each end) fix
the BackboxCV by screwing through the
plasterboard and self tapping into the
backbox mounting lip . When positioned
correctly, the backbox’s speaker mounting lip
with soft foam surface should be visible along
all four sides of the aperture.
It is recommended to add sound absorbing
mineral wool inside the surrounding cavities
to further reduce sound transmission behind
the speaker. (2” maximum thickness)
03 Locate cable and position BackboxCV
Pull the speaker cable through the rubber
grommet in the top side of the BackboxCV
and ensure speaker cables are pulled
through with a manageable length available.
Doing this will make it easier to connect the
cable to the speaker later on in the
installation process.
Position the BackboxCV within the aperture
so as to rest it against the back side of the
plasterboard.
Use the fold out tabs at either end of the
backboxCV to help support it in position
before securing it to the plasterboard.
A 75mm/3" cavity depth is required to fit a
BackboxCV.
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Side View
Using the
fold out tabs...
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Plasterboard
Fixing screw
Mounting
Lip
Backbox
Side View
Front View Fixing screw
BackboxCV installation continued...
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Fixing the speaker to the BackboxCV
Once the speaker has been electrically
connected it can now be fixed to the
BackboxCV.
With the speaker resting on the speaker
mounting lip use drywall screws to secure
the speaker onto the BackboxCV by self
tapping into the speaker mounting lip ,
through the speaker fixing holes .
Ensure the speaker face is aligned correctly
(see alignment section, pages 5 - 9) and that
everything is firmly held in position. Shims
may be necessary.
Amina backboxes (BackboxCV) are designed
for 12.5mm (1/2”) plasterboard.
Shims can be supplied to adapt the
backboxes for different plasterboard
thicknesses. Contact your supplier when
ordering.
For plasterboard thicker than 12.5mm (1/2”) fit
shims between speaker and speaker
mounting lip .
For plasterboard thinner than 12.5mm (1/2”) fit
shims between the back of the plasterboard
and the backbox mounting lip .
BackboxCV installation continued...
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06 Testing
Speaker testing should be done before
plastering. For information on speaker testing
please refer to your Amina Invisible
loudspeaker installation guide (Section C)
07 Plastering
Please refer to pages 10 and 11 for details on
how to plaster your loudspeaker after you
have installed the BackboxCV and speaker.
The following section of this guide shows how to align the BackboxCV for the different plastering
techniques that can be used.
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Side View
12.5mm
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For plasterboard thicker than 12.5mm
Shim adhered to speaker
For plasterboard thinner than 12.5mm
Shim adhered to Backbox

Retrofit / pre-skimmed plasterboard
Patch plastered nish
Alignment and plastering preparation
BackboxCV alignment required for plastering
After removing a 30-50mm (3/16 - 2”) wide
section of existing plaster surrounding the cut
out, the front face of the speaker should be
flush with the paper face of the plasterboard,
if the BackboxCV has been fitted correctly.
This method positions the speaker to be
patch plastered with a 2mm (5/64”) skim
across the speaker front, blended with the
existing plaster on the plasterboard.
Amina recommend British Gypsum Easi-fill®
which allows a smooth accurate finish using
fine sandpaper or a wet sponge.
For walls /ceilings that have already been
plastered.
30-50mm
3/16 - 2”
sand down to
create taper
existing plaster
remove existing
plaster from
plasterboard
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Retrofit / pre-skimmed plasterboard
Feathered skim nish
BackboxCV alignment required for plastering
Using a 2-3mm shim set (contact your Amina
supplier) between the back of the speaker
and the speaker mounting lip , the front
face of the speaker should be flush with the
front face of the existing painted/plastered
wall/ceiling.
This method positions the speaker so that a
much larger area around it (approx. 1m2
(39”)) can be skimmed. This 2mm (5/64”)
thick skim is then feathered outward at the
edges and blended into the existing
wall/ceiling finish.
existing plaster
speaker face
flush with
existing plaster
2-3mm shim
required between
speaker and
BackboxCV
For walls /ceilings that have already been
plastered.
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New build / new plasterboard
Full wet skim nish
BackboxCV alignment required for plastering
The front face of the speaker should be flush
with the face of the new wall/ceiling if the
BackboxCV has been correctly installed.
This method positions the speaker to be skim
plastered over during the process of the
entire wall/ceiling being plastered.
raw plasterboard
surface
For new plasterboard walls /ceilings that have
not yet been plastered.
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Retrofit / new drywall
Patch plaster nish
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BackboxCV alignment required for plastering
The front face of the speaker should be
located 2mm (5/64”) behind the face of the
new wall/ceiling if the BackboxCV is correctly
installed.
For new drywall walls /ceilings that will be
taped and joined.
(North American construction)
This method positions the speaker to be
patch plastered with a 2mm (5/64”) skim
across the speaker front and blended with
the drywall.
Amina recommend British Gypsum Easi-fill®
which allows a smooth accurate finish using
fine sandpaper or a wet sponge.
raw
drywall
surface
shims (if
required)
remove a section
of drywall around
the cut out
30-50mm 3/16 - 2”

Retrofit / new drywall
Feathered skim nish
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BackboxCV alignment required for plastering
The front face of the speaker should be flush
with the face of the new wall/ceiling if the
BackboxCV is correctly installed.
raw drywall
surface
This method positions the speaker for a large
area (approx. 1m2(39”)) to be skimmed over
it. This 2mm (5/64”) thick skim is then
feathered outward at the edges and blended
into the existing wall/ceiling finish.
For new drywall walls /ceilings that will be
taped and joined.
(North American construction)

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Plastering and decorating
Apply PVA
Using a brush or foam roller, apply a thin
coat of PVA (wood glue) to the entire speaker
panel surface, this will assure proper
adhesion between the panel surface and the
plaster coating.
PVA primer is fast drying and can usually be
ready to plaster after one hour or in
accordance with the manufacturers
instructions. Ensure PVA primer is completely
dry before proceeding.
Important: Amina recommends you leave the
PVA to dry for at least several hours, this will
ensure the panel surface and surrounding
areas are totally dry, sealed and ready for
plastering.
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Fill gap between speaker and surrounding
area
It is important to ensure that plaster is
pushed into the 2mm (5/64”) gap that
surrounds the speaker. This will create a
strong bond between the edge of the
speaker and the wall.
This further helps to prevent any cracks
appearing in the skim finish.
IMPORTANT: There MUST be a gap of 2mm
(5/64”) all the way around the speaker edge.
If there isn't simply remove the speaker and
increase the aperture size accordingly
(plasterboard installations only)
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Finishing
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Plastering and decorating continued...
Apply joint tape
Apply professional plasterboard joint scrim
(Amina recommend use of a self adhesive
fibreglass scrim tape) over the joint between
the speaker and the surrounding wall.
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Plastering
Use standard finishing plaster for large areas.
For patch plastering use a repair plaster such
as British Gypsum Easi-fill®
Important: To ensure proper operation and
sonic performance, no more than 2mm
(5/64”) of plaster must be applied to the
surface of the panel.
The working environment must be dry
enough to allow the plaster finish coat to dry
within hours, not days.
Note:
Amina have separate guides for information
about installing the product behind other
materials and surfaces such as wooden
panels, acrylic and melamine (Formica®).
Contact Amina if you require any of this
additional information.
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Decorating
Allow your plasterwork to dry completely.
Test the speaker again. You can then paint
the surface or hang wallpaper in the usual
manner.
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Copyright information
Warranty information
Limited Warranty:
The Amina BackboxCV is designed to last for many years. Correctly installed in accordance with these
instructions, Amina warranties the BackboxCV against defective materials and workmanship for a
period of five years in commercial applications and ten years in residential applications.
At the end of the product’s useful life it should be recycled in a responsible manner. The majority of the
product is aluminium, a valuable asset. If you have any questions please contact Amina Technologies
Ltd.
* Please refer to our full warranty statement for details, available on our websites, or alternatively
contact us via email on any of the above addresses.
Important Note: This product does not comply to European Construction Products Directive EN 54-24
and therefore must not be used in European voice evacuation systems.
This document is Copyright of Amina Technologies Ltd, 2013
Easi-fill is a registered trademark of British Gypsum Ltd
Amina is a registered trademark of Amina Technologies Ltd
Contact information
Amina Technologies Ltd
Cirrus House, Glebe Road, Huntingdon
Cambridge, PE29 7DL, UK
T: [phone]
E: [e-mail]
W: www.amina.co.uk
Document version 1.0. revision 1.1
North America
Direct 1-905 655 6411
Toll free 1-866 462 6462
Toll free Fax [phone]
E: [e-mail]
W: www.aminatechnologies.com
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Amina Technologies Ltd
Cirrus House, Glebe Road
Huntingdon, Cambs, PE29 7DL England
T: + 44 1480 354390 / E: inspir[email protected]o.uk