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4
PRODUCT PREPARATION
Amplifier Selection
Sonance DSP Amplifiers are highly recommended
for IS6, IS8, and IS10 full-range speakers. These amps
have preloaded curves to optimize the performance of
Invisible Series speakers and woofers. Preconfigured
curves for various finish types and thicknesses allow for
eortless calibration without the need for additional
measurement equipment.The IS10W woofer requires
a Sonance DSP amplifier in order to ensure high
performance, to protect the speaker and installation,
and to achieve consistent results. Sonance DSP
Amplifiers are rated down to 4 Ohms and are stable to
2 Ohms. Never run more than two Invisible Speakers in
parallel on one amplifier channel.
NOTE: Pay close attention to Sonance IS speaker
rated RMS power handling. Select an amplifier with
maximum RMS watts per channel at 4 ohms that
closely matches or is less than the IS speaker’s rated
power handling (see page 16). If the amplifier’s power
capabilities exceed those of the speakers, damage to
the speaker or installed finish may occur if the speaker
is overdriven.
Wire Gauge - 8 ohm Systems
When using the product in an 8 Ohm (low impedance)
system, the total wire resistance should be less than 10%
of the speaker impedance. The speakers are nominally
6 Ohms impedance, so your total wire resistance should
be no more than 0.6 Ohms. In simple terms, the extra
resistance from the wire will have a very negative aect
on the sound quality of the speaker. The sound can
be less dynamic, definition of bass frequencies can be
reduced, and in extreme cases, the high frequencies can
be attenuated. Amplifier power is also wasted in the
wire, reducing the maximum output level of the system.
Please refer to the chart below when deciding on the
appropriate wire gauge for your installation.
SPEAKER LOCATIONS
Invisible Series full-range speaker models (IS6, IS8,
IS10) have a 170 degree hemispherical dispersion
pattern. The IS10W woofer has a 180 degree
hemispherical dispersion pattern. This allows for a wide
WIRE RESISTANCE IN OHMS VS. LENGTH OF CABLE RUN
DISTANCE
50’
15.2m
100’
30.5m
150’
45.7m
200’
61m
250’
76.2m
300’
91.4m
20 GAUGE 0.86 1.73 2.59 3.45 4.32 5.18
18 GAUGE 0.65 1.30 1.94 2.59 3.24 3.89
16 GAUGE 0.43 0.85 1.28 1.71 2.14 2.56
14 GAUGE 0.27 0.54 0.81 1.08 1.35 1.62
12 GAUGE 0.17 0.34 0.51 0.68 0.85 1.02
range of applications and installation locations. It is
recommended that speakers be wall-mounted 7 feet
(2.13 meters) or more above finished floor (AFF) or in-
ceiling to avoid being punctured or damaged. Ensure
that the speaker will not be covered by cabinetry,
draperies, art, crown molding or anything that could
cover or puncture the speaker. Face the Wave Flex Drive
Unit away from the ceiling when installing in walls and
away from the walls when installing in ceilings. Ensure
that the back of the speaker has clearance and will not
be adjacent to other building systems such as electrical,
HVAC, pipes, fire sprinklers or others that could violate
local building codes or adversely eect sound quality.
INSTALLATION ACCESSORIES
The use of space savers and preconstruction zip
rings will assist in better coordination of trades and
is recommended for the best result. Space savers are
a great way to reserve the precise dimensions and
location of your Sonance Invisible Series speakers
during the construction phase and will protect your
speaker wire from getting lost within the wall or ceiling
cavities. The space saver allows you to delay the
installation of the actual invisible speaker to just prior
to the finishing stage. This reduces the risk of damage
or theft of speakers on the job site. If your project calls
for large quantities of invisible speakers, you may use
our preconstruction zip ring brackets as an easy guide
for getting the perfect drywall cutout using a drywall
zip tool. These can be installed in conjunction with the
space savers or on their own and are to be used when
drywall will be laid up directly over speaker locations.
Zip rings are made-to-order, so please contact your
Sonance representative for bulk pricing and availability.
FINISH MATERIALS
Prior to speaker installation, verify that the topping
compound and final finish are flexible materials (slow-
setting drywall mud/topping compound, wallpaper,
acrylic-based Venetian plaster, thin wood veneer) and
will not exceed 3mm (1/8”).
Our recommended target for optimal performance
is between 1.0 and 1.5mm (about 1/16”) of topping
compound. Sound quality and installation durability
will be adversely eected if too much topping
compound is applied. For wood veneer finishes, use
only 20mil (0.5mm) veneer with paper backing.
Do not use hard-setting or sti materials over the
surface of invisible speakers, such as fast-setting
drywall mud (“hot mud”), genuine Venetian plaster,
stucco, metal panels, tile, etc.
SPACE SAVER PART NUMBERS
IS-SAVER-S IS6 93492 4-pack
IS-SAVER-M IS8/IS8T/IS10W 93493 4-pack
IS-SAVER-L IS10 93494 4-pack
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