Russound Advantage Series - Manual (Page 4)

4
Space Requirements & Impedance Matching
SPACE AND WALL REQUIREMENTS
SPACE REQUIREMENTS
Russound Advantage Iso-Mount speakers require a mini-
mum wall depth of 3-5/8” (9.2 cm) (measured from the
outside face of the mounting surface), and require at
least 1.4 cubic feet of space behind the speaker for optimal
performance.
WALL REQUIREMENTS
ACCEPTABLE INSTALLATION SITUATIONS:
• Any wallboard and 2x4 stud wall
• Lath and plaster wall
• Wood paneling and 2x4 stud wall. The dense, rigid
nature of plasterboard (or lath and plaster) or thick
wood paneling acts as a superb speaker baffle.
UNACCEPTABLE INSTALLATION SITUATIONS:
• Brick or concrete walls where the wallboard or panel-
ing is attached to thin furring strips – This type of
wall can’t provide proper depth (clearance) for the
back of the Russound Advantage speakers.
• Locations concealing pipes, heating ducts and AC
wiring – These elements can complicate speaker
mounting and installation of speaker wire. AC wiring
can induce hum caused by close proximity to the
speaker.
IMPEDANCE MATCHING FOR AMPLIFIER AND
SPEAKERS
Not all amplifiers or receivers can safely operate two
sets of speakers at once. If you intend to run your
Russound Advantage speakers and your main speakers
concurrently, or if you intend to hook up and run two
sets of speakers at the same time, it’s important to con-
sider both the impedance of the speakers and the capa-
bilities of the amplifier or receiver you’re using.
A speaker’s impedance rating indicates the amount of
electrical resistance it places against current flowing from
a receiver’s outputs. If the total speaker load does not
present adequate resistance, the receiver increases its
power output. Low-impedance speakers may hamper
operations of receivers not designed to deliver large
amounts of current to low-impedance loads. This may
lead to greater distortion, and causes the receiver to run
hot or activate its protection circuitry.
First, consult the owner’s manual for your amplifier or
receiver. It should state the minimum speaker imped-
ance during multiple speaker operation. The impedance
may also be printed on the back of the amplifier/receiv-
er next to the speaker connectors. If you can’t readily
determine this information, consult the dealer where you
purchased the amplifier or receiver, or call the manufac-
turer of the product in question.
The impedance rating for your Russound Advantage
Music Series speakers is 8 ohms, 6 ohms for the Hi-Fi
Series. Next, determine the impedance of your other
speakers. It may be printed on the back of the speaker
near the connection terminals, or you can consult the
speaker’s owner’s manual. Speaker impedance must be
equal to or higher than the amplifier/receiver speaker
output impedance rating. For instance, an
amplifier/receiver that is rated for two pair of 8 ohm
speakers cannot support two pair of 4 ohm speakers.
If the amplifier/receiver is not rated for the speaker con-
figuration desired, external volume controls and/or
speaker selectors can maintain the impedance levels
that will allow your amplifier/receiver to operate safely.
Russound makes a complete line of these products,
from Impedance-Matching Volume Controls to
Impedance-Matching Speaker Selectors. Ask your
Russound dealer for details or request a catalog from
Russound at 800-638-8055 (U.S. and Canada) or +1-
603-659-5170 from outside the U.S.