Amina MobiusiB User manual

®
THE INVISIBLE SPEAKER CO.
V0 draft 6 June 2019
Compatibility
This installation guide covers installation of the Amina MobiusiB Invisible loudspeakers into cavity
walls and ceilings.
Other installation guides are available to download at www.aminasound.com for walls built with
different construction methods.
Always choose the installation guide that matches the speaker and wall type for your installation.
Amina MobiusiB, Plaster Over Invisible
Loudspeakers
Installation Guide
Audio for very smart homes®

The Amina MobiusiB series of Loudspeakers
is designed to deliver best in class audio
performance in fully concealed in-wall
and in-ceiling applications, preserving the
interior aesthetic of any space.
Featuring an integrated Backbox housing,
Amina MobiusiB products are designed
for quick installation into cavity walls and
ceilings of any construction type.
Wall Construction
This installation guide describes fully
the installation of the Amina MobiusiB
loudspeaker into cavity stud walls or
ceilings constructed of plasterboard panels.
This method must not be used to install
MobiusiB speakers into other wall types.
Refer to www.aminasound.com to
download installation guides for installation
of the MobiusiB speaker into other wall
types.
What’s in the box
The following items are included with each
Amina MobiusiB loudspeaker -
1 x Amina MobiusiB loudspeaker
2 x Mounting strips
8 x Countersunk head, stainless steel
fixing screws.
1 x Quick reference installation guide
with installation template
2 x Lever splice connectors*
*Other connectors may also be included,
allowing the installer to choose a preferred
connection method.
Amina MobiusiB Fully Concealed Loudspeakers

Caution: Read before installing this
product ..........................................................................1
Environmental............................................................3
Sound in your home ...............................................4
Sound in your work or leisure
environment ...............................................................4
Message from the Managing Director ..........5
About the Manufacturer .......................................5
Introduction ................................................................6
Installation options.............................................6
Unpacking ...................................................................6
Packaging....................................................................6
Compatibility .............................................................6
Overview......................................................................7
Setup tips.....................................................................8
Installation.................................................................10
Speaker protectors ..........................................10
Cutting the opening for the speaker....... 12
Locating joist work ....................................... 13
Check the width between the joists..... 13
Check width between the joists ............. 14
Fix the template to the wall ..................... 15
Cut around the template ........................... 15
Remove the cut section.............................. 16
Fitting the speaker ........................................... 17
Fitting the mounting strips ....................... 17
Feed the cable ................................................ 18
Splice options.................................................. 19
Prepare the wires........................................... 19
Connecting the positive wires ................ 19
Secure the positive wires .......................... 19
Connecting the negative wires .............. 19
Fit the speaker into the wall ...................20
Fix the speaker in place ............................. 21
Check the screw fixings ............................. 21
Testing ........................................................................ 22
Testing the speaker......................................... 22
Resistance test............................................... 22
Connect the APU protection device.... 22
Sweep test ....................................................... 22
Music test.......................................................... 22
Problems during test...................................... 23
Insecure drywall............................................ 23
Metal studs....................................................... 23
Cable buzzing ................................................ 23
Lighting fixtures ............................................ 23
Finishing .................................................................... 24
Preparing the speaker for plastering..... 24
Filling the perimeter.................................... 24
Taping the joints and panel surface.... 24
Plastering.............................................................. 25
Full plaster skim coat.................................. 25
Cutaway view .................................................... 26
Decorating................................................................ 27
Drying................................................................. 27
Re-test ................................................................ 27
Decorating........................................................ 28
Non-permeable coatings ......................... 28
Final Test ................................................................... 29
Checking the completed installation.. 29
Maintenance and cleaning...............................30
Re-decoration .........................................................30
Accessories................................................................ 31
Subwoofers .......................................................... 31
Troubleshooting..................................................... 32
Advice for testing............................................. 32
No or low sound output................................. 32
Distortion, buzzing or rattles at
modest volumes................................................ 33
Very low output after speaker passes
electrical tests ................................................... 33
Distortion at higher volume levels .......... 33
Specifications.........................................................34
Mobius series - Plaster over products ...34
Fire resisting installation................................... 35
Warranty information......................................... 35
Copyright information ....................................... 35
Contact information............................................36
Contents

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Caution: Read before installing this product
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.
FIRE PROTECTION:
When making an intrusion into an
internal wall or ceiling to install an
Amina loudspeaker be sure to check the
appropriate regulations pertaining to the
required fire rating. Depending on the
location of the intrusion and the applicable
regulations it may be necessary to build in
or install additional fire rated components
or products to enclose the speaker and
back box. Amina Technologies take no
responsibility for the correct specification
and installation of any such fire protection
system that is required behind their
loudspeakers.
SPEAKER PROTECTION:
Amina loudspeakers should be installed
with an APU or other suitable electrical
overload protection device. These devices
help ensure the loudspeaker operates
reliably for many, many years ahead, by
limiting and protecting against temporary
excessive audio signals that could damage
the product.
Common sense should always prevail
though. Your product should never be
operated at repeated or consistently
excessive audio levels. Never operate your
Amina loudspeakers at a level where audio
reproduction sounds distorted.
For the ultimate in protection, Amina
recommend using the Amina A100Q digital
amplifier to drive your loudspeakers. It
continuously prevents unwanted and
excessive electrical energy from reaching
the speaker whilst allowing it to perform at
its very best at all times.
METAL FRAME CEILINGS:
When installing in metal frame (MF) ceilings
(& walls), please ensure the assembled metal
frame is fully solid and secure and that all
metal mating joints are mechanically fixed
or bonded together. Metal joints that are not
tightly fixed have the potential to generate
spurious buzzing noises as the two free
edges rub against each other when activated
by the acoustic energy generated by the
Amina Loudspeaker. All debris, loose screws,
excess materials etc, should be removed from
above ceilings to avoid unwanted rattles.

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• To ensure optimal performance, 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,
cold bridges and heat sources, strong
vibrational forces, chemical fumes, dust
and moisture (steam).
• Do not expose this product to sudden
temperature changes or locate it in an
environment with high humidity. This
is to prevent condensation forming
inside which may cause damage to the
product.
• Do not clean this product with chemical
solvents as this may damage the finish.
Use a clean, dry or damp cloth.
• Ensure that all installation mounting
surfaces are able to support the weight
of the product and any mounting
accessories.
• After installation, avoid pushing on the
wall or ceiling surface immediately
in front of the speaker. Excessive
excursion can crack the plaster around
its perimeter and can damage the
loudspeaker.
• Do not attempt to modify or repair the
product. Contact your distributor or
Amina if a fault should occur.
• When plastering over, ensure only 2mm
of material covers the product. More
than this will degrade the performance
of the product and could lead to
product failure.
• Avoid the use of silicone sealants
within the area of the loudspeaker.
Sublimation of silicone will deposit a
thin layer of silicone material on the
panel surface, severely degrading the
ability of plaster to bond to its surface.
• You will require a minimum cavity depth
of 70mm behind the plasterboard for
installation of a MobiusiB.
• Prior to plastering, wipe the front panel
surface clean with a damp cloth.
Caution: Read before installing this product

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Environmental
• Before installing, ensure that the
building is environmentally sealed, de-
humidified to a maximum of RH50%,
and at a stable temperature of at least
16 degrees centigrade (61 degrees
Fahrenheit)
• This product should not be used with
single thick coat plaster solutions or
with other finishing methods that take
days (rather than hours) to dry out.
• Please be aware that when this product
is directly fitted into a solid brick, block
or concrete wall structure, vibrational
energy is inevitably transferred into the
solid wall structure. This energy can
travel for some considerable distance
up, down and along the structure. It is
therefore recommended the product
be fitted within acoustically isolated
stud walls or ceiling sections where
possible. The use of the product
directly embedded in solid walls is
not recommended in multi occupancy
buildings.
• Please be aware that when this product
is fitted in simple (stud or rafter with
plasterboard/floorboard attached on
either side) stud walls or wooden rafter
ceiling/floor structures, vibrational
energy is inevitably transferred into
the building structure. This energy can
travel for some considerable distance
up, down and along the structure. It is
therefore recommended the product
be fitted within acoustically isolated
stud walls or ceiling sections where
possible. Special care should be taken
when installing the product in multi
occupancy buildings.
• Completed and fully dried plaster
surfaces should be finished with
permeable coatings / materials, to
allow moisture in that coating or
the adhesives used to apply those
materials, to dry into the environment,
rather than trap moisture in the
speaker.
• During installation take care to use
appropriate and suitable joint filling
compounds to fill the gap between
speaker and the surrounding surface.
This gap should be no less than 2mm
and no more than 5mm in width.
Inappropriate compounds used in such
a joint can shrink and crack excessively
and lose strength.
Allow the joint to dry thoroughly
before applying surface skim coats,
as shrinking in the joint depth whilst
drying could create a very slight
embossed outline in the finished and
decorated surface.
• As a general rule in the construction
industry, any drying process should
be gradual rather than forced with
excessive heat otherwise materials can
lose strength and can crack.
• Amina Technologies take no
responsibility for inappropriate use of
materials and environmental conditions
under which they are applied.

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Sound in your home
Amina products are widely applied
in whole house audio systems and
multichannel home cinemas to create the
very best entertainment source whilst not
impinging on the design of your home.
Never imagine though that sound
reproduction is isolated to one room only
and will not be heard elsewhere in the
home. Sound from any audio source (a
person talking, a conventional speaker, a
TV or an Amina speaker) will transfer in air
through open doors, ventilation structures,
gaps under doors etc, to other areas of the
house. Sound will also pass mechanically
through the structure of the building (a
good example is the central heating boiler.
Most homeowners know exactly when it
is on!) to other areas quite some distance
away.
Whole house/multi-room audio systems
are designed to give you the very best
audio experience in the space/room you
might occupy at any one moment. This
does not mean to say that occupiers of
other rooms will not hear some of that
sound at the same time. They are more
than likely to experience it in some lesser
level and lesser quality than the intended
room.
Please remember therefore that it is
not always possible to enjoy the full
capabilities of your audio system when
other members of the household want to
remain undisturbed.
Sound in your work or
leisure environment
Amina products are widely applied in
prestigious retail, hotel, restaurant, office,
spa and other leisure facilities.
The Amina Active Sound Board technology
creates an incredibly even level of sound
across an entire space.
This creates an entertaining yet naturally
comfortable sound field for users and
occupiers.
At the same time the physical embodiment
of the speaker is totally unobtrusive,
allowing interior designers complete
freedom from technology.

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Message from the
Managing Director
Congratulations and thank you for
purchasing an Amina Technologies high
performance invisible loudspeaker.
At Amina we are proud of being at the
forefront of flat panel Active Sound
Board loudspeaker technology. All
the components that make up your
loudspeaker have been developed
specifically to provide the ultimate in
sound quality and reliability, whilst allowing
you to decorate, furnish and enjoy your
home in any way you wish without any
visible ‘clutter’ created by your audio
system.
At the heart of an Amina loudspeaker is our
high performance acoustic panel driver,
featuring a unique high power neodymium
magnet motor system. This enables the
product to provide high quality, high
loudness levels from such a compact
design. Please take a moment to read this
guide which will help you achieve the best
possible performance from your product.
Thank you and enjoy listening.
Richard Newlove
MD - Amina Technologies Ltd
About the Manufacturer
Amina Technologies Ltd is the world’s
leading designer and manufacturer of
truly invisible loudspeaker solutions. Our
flat panel loudspeakers have been used
in a wide range of both commercial and
residential applications for over twenty
years.
Luxurious hotels & spas, exclusive retail
outlets and stunning private residences
have all benefitted from using Amina
invisible loudspeakers, not only for its’
incredible aesthetic quality, but for its’
absolute ability to reproduce sensationally
clear audio across any space. Amina
has created the very best discrete audio
solution for architects, interior designers
and design conscious clients.
See our website for more details about
Amina and a selection of prestigious
projects completed using our products.

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Introduction
Thank you for purchasing Amina MobiusiB
series invisible loudspeakers. Properly
installed, these loudspeakers will provide
high quality sound for many years, even
decades, to come.
Installation options
Installation is simple, but should only be
attempted by professional building trades
with plastering experience and who have
completed an Amina installation training
course.
Please read the instructions carefully,
particularly the Installation section.
Unpacking
Check that your carton contains the
correct number of items and accessories.
Retain this Installation Guide. If you pass
the unit on to a third party make sure you
pass on the Installation Guide.
Packaging
CAUTION:
Take care when removing the loudspeakers
from the carton.
The packaging for Amina MobiusiB
loudspeakers 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 to Amina. Please recycle the packaging
should you wish to dispose of it.
The outer carton is made up of 80%
recycled board.
Compatibility
This installation guide covers installation
of the Amina MobiusiB range of Invisible
loudspeakers into cavity walls and ceilings
of plasterboard construction.
Other installation guides are available
at www.aminasound.com for installing
MobiusiB series loudspeakers into walls
built with the following construction
methods -
• Drywall.
• Retrofit into a cavity wall that is already
plastered.
• Solid walls.
Always choose the installation guide that
matches the speaker and wall type for your
installation.
Ensure that the Amina MobiusiB is
mounted using the stainless steel
screws provided to avoid screw
head rusting causing marks in the
wet plaster.

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Overview
1. Tubular splice connectors
2. Button splice connectors
3. Lever splice connectors
4. Audio cable to amplifier
5. Mounting tab x 4
6. Integrated Backbox
7. Active panel surface
8. Mounting strips
The MobiusiB speaker is supplied with three connector options for the speaker wiring.
• Conventional tubular splices that require a crimp tool for fitting (non-removable).
• Button splices that require a pair of large pliers for fitting (non-removable).
• Lever splices that may be fitted by finger pressure alone (removable).
All three connectors are reliable. Choose the connector that best suits your installation.
a
d
e
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bc
f
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Setup tips
APU protection
Amina loudspeakers must be used with
an APU protection device or another
protection device, approved by Amina.
Please refer to the instructions supplied
with the APU devices and full warranty
information for further details.
Alternatively, use the Amina A100Q
amplifier for the best protection and
acoustic performance.
Wall or Ceiling Placement
Amina loudspeakers are suitable for both
wall and ceiling installations. When the
most uniform audio coverage in a room is
required, space the loudspeakers evenly
in the ceiling. However, if the room has
a height greater than 4m (13’), Amina
suggests installing them in the walls at a
height of around 1.8m (6’).
In dedicated listening rooms where
loudspeakers are used in stereo or multi
channel systems, position them in the walls
so that the centre point of the speaker
is approximately 1 – 1.8m (3.5 - 6‘) from
the floor. This will give excellent results,
but don’t worry, if this is not possible
to achieve in your room, the audio
characteristics of Amina loudspeakers
make exact positioning according to
stereo, 5.1 and 7.1 conventions far less
critical.
Audio Characteristics
Amina loudspeakers generate sound
in a similar way to an acoustic musical
instrument. The speaker’s front face is
effectively the “musical” soundboard and
the sound waves generated from it are
diffuse and are dispersed over a very
wide angle. This means that loudspeaker
positioning is far less critical than with
conventional loudspeakers. Additionally,
just like the acoustic musical instrument,
Amina loudspeakers have excellent room
filling abilities.
Amina loudspeakers are planar devices
and this feature is further enhanced when
flush mounted into your wall or ceiling.
Being planar (or flat) means that the
audio’s arrival time to the listener is the
same for all frequencies, i.e. there is very
little phase distortion. Therefore Amina
loudspeakers (and other planar devices
such as electrostatic loudspeakers) can
reproduce subtle nuances on a recording
with incredible accuracy.
In addition to the above characteristics,
the radiating surface of an Amina speaker
is very stiff and undergoes very small
amounts of movement in order to generate
high sound pressure levels. This means
that the loudspeakers are inherently
“fast” making them highly articulate
loudspeakers.

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Setup tips
Speaker Orientation
Amina loudspeakers can be installed
either in portrait or landscape orientations.
Typically the spacing between wall
joists will dictate portrait orientation and
Amina have optimised the dispersion
characteristics for this setup. Therefore
when installing into walls Amina suggest
portrait orientation for best sound quality.
For non-critical listening in ceiling
installations the orientation of the speaker
is not crucial.
For critical listening in ceilings, e.g. a
5.1 surround system, ensure that the
orientation of all loudspeakers are the
same relative to the main listening position
and position the top of the speaker closer
to the wall/ceiling boundary.
To p
Bottom
System Requirements
From a system compatibility point of view
your speaker (and it’s accompanying APU
protection unit) can be treated like any
conventional low impedance (4-8 ohm)
loudspeaker. Amina recommends you use
a good quality amplifier so as to avoid
driving them with high levels of distortion,
which at best, will provide poor sound
quality and at worst may permanently
damage the loudspeaker.
The cable connectors supplied with the
MobiusiB speaker require 14 - 16AWG cable.
Amina recommends you connect your
loudspeakers to your amplifier with 16AWG
OFC (oxygen free) cable or 14AWG for runs
over 10m to avoid any chance of reduced
efficiency and restricted audio bandwidth.
For 2.1, 5.1, 7.1 and other multi-channel
systems, always use the amplifier’s
crossover settings to divert frequencies
below 100Hz to your subwoofer. This will
improve the dynamic range and power
handling of the system. (APU devices
should still be used).
IMPORTANT: Amina loudspeakers are
highly revealing of any shortcomings in the
source or amplifier. Please be aware that
some low cost zone amplifiers will produce
high amounts of distortion well within their
operating range and this will be ruthlessly
revealed by Amina loudspeakers.
Sound Transmission
As with any speaker designed to be fixed
to a structure within a wall or ceiling,
careful consideration should be given to
sound transmission into adjacent rooms
or properties. We recommend specialist
advice is taken if sound transmission into
adjacent rooms needs to be minimised.
Please talk to the Amina technical team for
advice on reducing sound transmission as a
starting point.
100/70V Option
For multi-speaker commercial installations,
please contact Amina for their range of
invisible loudspeakers supplied with 100V
or 70V line transformers fitted.
Boundary Loading
It is possible to increase the low frequency
output of Amina loudspeakers by
positioning them close (50mm - 150mm)
to the corners of a room. This can be useful
when no additional subwoofer (e.g. ALF80
or ALF120) is used.

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Installation
IMPORTANT: Read this section carefully
before attempting to install an Amina
MobiusiB loudspeaker.
To avoid any possible damage to Amina
invisible loudspeakers they must be
connected using the correct accessories,
supplied by Amina. The tables to follow list
these accessories.
Speaker protectors
Amina APU series speaker protectors
are specifically designed to work with
Amina invisible loudspeakers. They
provide essential safe operating functions
and include protection elements that
constantly monitor the power fed to the
speaker keeping it within safe limits should
the need arise.
An Amina speaker protector should be
wired in-line with each Amina speaker,
preferably in an accessible place, allowing
this device to be replaced as necessary.
APU devices are designed to
work with a single speaker. Never
connect more than one speaker
onto a single APU protection
device.
Refer to the table on the next page for
more detail of protection options for short
to medium periods of time.
However, common sense should always
prevail. Your product should never be
operated at repeated or consistently
high audio levels. Never operate your
Amina speaker at a level where audio
reproduction appears distorted.
For the ultimate in protection and
performance, use the Amina A100Q multi-
channel amplifier.
Refer to the table on the next page for
more detail of protection options for short
to medium periods of time.

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Installation
Speaker protectors
There are four types of protector.
Type Application Image
APU-RS8iC Flexible 8 channel high pass filter
and protection unit in a 1U case for
optional rack mounting. Provides
protection for installations of up to
8 Amina MobiusiB loudspeakers of
any type.
APU-RS16iC 16 channel high pass filter and
protection unit in a single 1U case.
Provides protection for up to 16
Amina MobiusiB loudspeakers of any
type.
APUiC Single channel high pass filter and
protection for wiring in-line with
each Amina speaker.
APUiC crossovers are available
in different versions and must be
ordered to match the speaker being
installed.
A100Q amplifier
Ultimate speaker
protection
Absolute protection of a
loudspeaker is possible by sensing
and controlling output voltages
within the amplifier driving that
loudspeaker. The Amina A100Q
amplifier integrates clean and
powerful amplification (4 channels
at 100W each) with sophisticated
digital sensing and control
technology to deliver the ultimate
protection for your Amina invisible
speaker. It both prevents excessive
audio signals from ever reaching
the speakers whilst allowing them
to perform at their absolute peak at
all times. This is achieved thanks to
some clever internal digital signal
processing software that knows
exactly how to get the best from
each speaker.
®
THE INVISIBLE SPEAKER CO
.

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Installation
Cutting the opening for the speaker
The MobiusiB must be fixed to the
plasterboard only, using the supplied
mounting strips or suitable alternatives.
It can also be attached through the
plasterboard into stud work or other
supporting structures.
IMPORTANT:
If your wall or ceiling structure involve a
timber layer (ply or OSB) as shown, no
mounting strips will be necessary.
Simply screw into the timber layer.
Studwork
Plywood or OSB
Plasterboard
Studwork
Back of speaker
Fixing strip
Plasterboard
Back of speaker
Top view of plasterboard wall
Top view of plasterboard
wall backed with plywood
Stainless screws
fix the speaker to
the fixing strip
Stainless screws
fix the speaker to
the ply or OSB

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Locating joist work
When you have chosen your speaker
locations, and before cutting into 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 the
MobiusiB speaker.
The following method is highly
recommended to measure the distance
between the joists.
Check the width between the joists
Using a padsaw or sharp knife, cut an
opening in the centre of the area where the
speaker will mount.
Installation
Cutting the opening for the speaker

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Installation
Cutting the opening for the speaker
Check that the total distance A + B is
greater than the dimension in the table to
allow clearance for the speaker you are
installing.
Speaker Distance A+B
Mobius7iB 355mm (14”)
Mobius5iB 355mm (14”)
Mobius3B 310mm (12 3/16”)
Mobius1iB 210mm (8 1/4”)
Mobius5/S200iB 210mm (8 1/4”)
Mobius DualB 355mm (14”)
Check width between the joists
Measure from the centre of the opening to
the joist on the left (A in the top image)
and the joist on the right (B in the bottom
image).
From these measurements you can
establish the width and centre of the space
between the joists.
A
B

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Installation
Cutting the opening for the speaker
We strongly advise that joists are not
cut to make space for the speaker. Any
activity of this sort may well influence the
structural integrity of your property.
Fix the template to the wall
The speaker is supplied with a template.
Tape or pin the template to the wall in the
space between the joists.
Cut around the template
Neatly cut around the mark on the
template using a knife or padsaw.
CAUTION:

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Installation
Cutting the opening for the speaker
Remove the cut section
Lift out the cut section of the wall.
Check the size of the opening.
This should measure -
Speaker Opening size
Mobius7iB 456mm x 355mm
(18” x 14”)
Mobius5iB 456mm x 355mm
(18” x 14”)
Mobius3B 406mm x 310mm
(16” x 12 3/16”)
Mobius1iB 456mm x 210mm
(18” x 8 1/4”)
Mobius5/S200iB 456mm x 210mm
(18” x 8 1/4”)
Mobius DualB 456mm x 355mm
(18” x 14”)

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Installation
Fitting the speaker
Fitting the mounting strips
The MobiusiB is supplied with two
mounting strips. These are secured behind
the upper and lower edges of the opening
cut for the speaker. The mounting screws
for the speaker will fasten into these.
• Mark the position for two screws,
centred and spaced by approximately
100mm (4”) above the opening to fix
the upper mounting strip as shown in
the image.
• Hold one of the mounting strips in
position behind the upper edge of the
opening.
• Secure it in place. Regular plasterboard
screws are suitable for fixing the strips.
NOTE: The screws supplied with the
speaker are stainless steel and should
be used to secure the speaker. Surplus
stainless steel screws can also be used to
secure the mounting strips.
• Mark the position for a screw, centred
and spaced by approximately 100mm
(4”) below the opening to fix the lower
mounting strip as shown in the image.
• Hold the remaining mounting strip in
position behind the lower edge of the
opening.
• Secure it in place with two screws.
100mm
x 1
x 1
x 1
100mm
x 1 x 1