QPS
1
Quadrapole Surround Speakers
Model QPS-1
Owner’s Manual
Part # 333-844-001
®
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PLANNING YOUR SYSTEM
To help plan your home theater system, we’ve included two system applications, as
shown in Figures 1 and 2. The first one represents a typical living room where the home
theater system is the main focus. In the second application, the furniture is arranged for
fireplace viewing and the entertainment center is in a corner.
SURROUND PLACEMENT
CONCERNS...
Since QPS-1 surround speakers are a quadropole design, exact placement is not critical.
For best results, position the speakers so they are level with or behind the listeners
(typically seated on a couch). Place them at or above ear level (28" or 0.7m, depending
on the available shelf or wall space). Make sure the speaker marked left (on its rear
label) is on the left side (as you face forward), and the speaker marked right is on the
right side (see Figure 1).
STAND-UP
O
R
Set each speaker on any convenient shelf or table via a built-in display stand (see Figure
3 on page 4). Or use the built-in keyhole (see Figure 3 on page 4) for a more permanent
mounting method.
WALL-MOUNT...
Figure 1. This overhead view shows
a typical home theater plan. The
QPS-1 speakers can be placed on
stands in the noted areas or wall-
mounted on side or back walls.
Big Screen TV
Left
Channel
Right
Channel
Center Channel
on top of TV
QPS-1
Left Surround
(on side wall)
QPS-1
Right Surround
(on side wall)
Couch
Left Surround
Placement Area
Right Surround
Placement Area
(or use rear wall)
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Figure 2. This layout is often
preferred when a fireplace is the
centerpiece of the room.
Fireplace
Right
Channel
QPS-1
(Right Surround)
Center Channel
on top of TV
Left
Channel
Couch
QPS-1
(Left Surround)
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PLACEMENT AND MOUNTING
The Infinity QPS-1 surround speakers are equipped with integral display stands for easy
TABLE-TOP PLACEMENT...
placement on a shelf or table.
QPS-1
(Table-Top Placement)
Bottom View
WALL-MOUNT OPTIONS...
IMPORTANT!
For wall-mounting, you can use the speaker’s keyhole (see Figure 3).
If you are unsure of how to safely and securely wall-mount a speaker, please ask a home
theater or hardware specialist for additional help.
Figure 3. Use the built-in keyhole to mount
QPS-1 surround speakers on walls.
❷ Align keyhole with
screw head and
slide speaker down.
NOTE: Be sure to fasten each #8 x 1 1/2
"
Phillips-head wood screw into a wall
stud before hanging the speaker.
❶ Fasten #8 x 11⁄2"
Phillips-head
wood screw
into wall stud;
leave 1⁄16" space
from head to wall.
QPS-1
(Wall-Mount Via Keyhole)
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WIRING THE SYSTEM
After placing the speakers, you are ready to connect your system. First turn off all audio system
power. Use high-quality speaker wire to make the connections. Consult the owner’s manuals
(included with your amplifier, receiver or television) for connection and operation procedures.
WIRING AND POLARITY...
IMPORTANT!
QPS-1 speakers have gold-plated terminals that accept a variety of wire connectors (see Figure 4
below). Observe correct polarities when making speaker connections, as shown in Figure 5 (on
page 6).
Connect each terminal on the back of the amplifier, receiver or television to the respective
+
(red) terminal on each speaker. Connect the (black) terminals in the same way.
+
–
Do not reverse polarities (e.g., to or to ) when making connections.
+
+
- -
TESTING THE SPEAKERS
After placing and wiring the speakers, turn on audio system power. Follow the
instructions (packed with your A/V preamplifier or receiver) to calibrate the
®
®
Dolby Pro Logic or Dolby Digital channels. Most components include a built-in
test tone to help you balance the sound levels to all speakers in your system. During
calibration, verify that each QPS-1 reproduces the test tone. If not, check the wiring
connections and see the Troubleshooting chart (on page 7) for help.
Figure 4. QPS-1 surround speakers feature
gold-plated terminals that can be
connected in several different ways;
e.g., banana plugs, spade terminals
(not shown) and direct wiring.
Speaker Wire
No Stripe = + Stripe =
Speaker Wire
Stripe = No Stripe = +
–
–
❷ Insert Bare End;
Tighten Terminal
Red = +
Red = +
Black =
Black =
–
–
❷ Insert Bare
Wire End;
Tighten Cap.
❸Insert Plug
Into Connector.
❶ Loosen Terminal.
CONNECTING SPEAKERS
DIRECTLY TO WIRES
❶ Loosen Cap.
CONNECTING SPEAKERS
USING BANANA PLUGS (NOT SUPPLIED)
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Front Right
Center
Front Left
®
Rear
+
-
Rear
Rear
F
ULL RANG
E
R
F
ULL RANG
E
R
LOUDSPEAKE
LOUDSPEAKE
model P-F
R
model P-F
amplifier 0-150W
6
R
amplifier
6
1
Ω
0-150W
1
Ω
INPUT
INPUT
–
+
–
+
+
+
-
-
-
-
+
+
-
+
-
-
+
+
Front
Front
A/V Receiver
(Rear Panel)
Right
Center
Left
Surround
Surround
IMPORTANT!
In Dolby Digital/AC-3®
Set Surround
Channels To SMALL.
+
+
-
-
Rear
Rear
QPS-1
QPS-1
Surround Right
Surround Left
Figure 5. Wiring diagram shows
connections for a typical home
theater system.
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CARE OF YOUR SPEAKER SYSTEM
The QPS-1 cabinet does not require any routine maintenance. When cleaning is needed,
first make sure power is off, and then use a soft cloth, pre-dampened with a solution of
mild detergent and water, to remove any fingerprints or to wipe off dust. DO NOT USE
ANY OTHER CLEANING PRODUCTS OR POLISHES.
The metal grille can be cleaned with gentle vacuuming.
TROUBLESHOOTING
SYMPTOM
CAUSE
SOLUTION
No sound
Power is off
See A/V preamplifier
or receiver owner’s
manual for operation
and further help
Speakers not connected
Connect speakers
(see pages 5 and 6)
Distortion with
volume control
near minimum
Defective A/V preampli-
fier or receiver
Repair defective AV
preamplifier or receiver
Shorted speaker wires
Check or repair wiring
(see pages 5 and 6)
Distortion on music
peaks or sound
effects (e.g., pops
or rapping noise)
Dynamic soundtrack
(e.g., explosions)
causes speaker
Turn down master
volume control to
lower overall range
to “bottom out”
Tone controls
are set too high
Set bass and treble flat;
use controls sparingly
Buzz, hum or
crackle when
connecting wires
Connecting wires
with power on causes
transient signal spikes
Connect wires only
when audio system
power is off
Buzz or hum when
A/V preamplifier or
receiver is on
Grounding problem
See A/V preamplifier
or receiver owner’s
manual for operation
and further help
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SPECIFICATIONS QPS-1
Frequency Range:
80 ~ 20,000Hz (–6dB@80Hz)
88dB spl (2.83 volts/1 meter spatially averaged)
PERFORMANCE DATA
Sensitivity:
Impedance:
8 Ω (5.5 min.)
Maximum Peak Output:
Amplifier Requirements:
108dB (spl on program)
Suitable for use with amplifiers
10 ~ 80W (@ 8 Ω)
Four
3 inch
DRIVE UNITS
DIMENSIONS
Width:
Height:
Depth:
Weight:
11 inches
8 1⁄2 inches
4 1⁄2 inches
7 pounds
Declaration of Conformity
We, Infinity Systems A/S
Kongevejen 194B
DK-3460 Birkerød
DENMARK
declare in own responsibility, that the product described
in this owner’s manual is in compliance with technical
standards:
EN 50 081-1/1992
EN 50 082-1/3.1995
Steen Michaelsen
Infinity Systems A/S
Infinity is a registered trademark of Infinity Systems, Inc.
Birkerød. DENMARK. 10/97
Dolby, Pro Logic and AC-3 are registered trademarks of Dolby Laboratories.
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Infinity QPS-1 – Owner’s Manual
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www.infinitysystems.com
P/N: 333-844-001
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