Infinity PS-8 Subwoofer

Infinity PS-8 Subwoofer
Powered Subwoofer
Owner’s Guide
Read First!
CAUTION: To prevent electric shock,
do not use this (polarized)
plug with an extension cord,
receptacle or other outlet
unless the blades can
be fully inserted to
prevent blade exposure.
The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert the user to the presence of uninsulated
“dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude to constitute a
risk of electric shock to persons.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in
accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as
radiators, heat registers, stoves or other apparatus
(including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized
or grounding-type plug. A polarized plug has two
blades with one wider than the other. A groundingtype plug has two blades and a third grounding
prong.The wide blade or the third prong are
provided for your safety. If the provided plug does
not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
10. Protect the power cord from being walked
on or pinched, particularly at plugs, convenience
receptacles and the point where they exit from
the apparatus.
11. Only use attachments/accessories specified by
the manufacturer.
12. Use only with the cart, stand, tripod, bracket or
table specified by the manufacturer or sold with the
apparatus. When a cart is used, use
caution when moving the cart/
apparatus combination to avoid injury
from tip-over.
13. Unplug this apparatus during lightning storms
or when unused for long periods of time.
14. Refer all servicing to qualified service
personnel. Servicing is required when the
apparatus has been damaged in any way, such as
power-supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to rain
or moisture, does not operate normally, or has been
15. Do not use attachments not recommended by
the product manufacturer, as they may cause
16. This product should be operated only from the
type of power source indicated on the marking
label. If you are not sure of the type of power
supply to your home, consult your product dealer or
local power company. For products intended to
operate from battery power, or other sources, refer
to the operating instructions.
17. If an outside antenna or cable system is
connected to the product, be sure the antenna or
cable system is grounded so as to provide some
protection against voltage surges and built-up
static charges. Article 810 of the National Electrical
Code, ANSI/NFPA 70, provides information with
regard to proper grounding of the mast and
supporting structure, grounding of the lead-in wire
to an antenna discharge unit, size of grounding
conductors, location of antenna-discharge unit,
connection to grounding electrodes, and
requirements for the grounding electrode.
See Figure A.
18. An outside antenna system should not be
located in the vicinity of overhead power lines or
other electric light or power circuits, or where it
can fall into such power lines or circuits. When
installing an outside antenna system, extreme
care should be taken to keep from touching such
power lines or circuits, as contact with them might
be fatal.
19. Do not overload wall outlets, extension cords, or
integral convenience receptacles, as this can result
in a risk of fire or electric shock.
20. Never push objects of any kind into this product
through openings, as they may touch dangerous
voltage points or short-out parts that could result in
a fire or electric shock. Never spill liquid of any
kind on the product.
21. Do not attempt to service this product yourself,
as opening or removing covers may expose you to
dangerous voltage or other hazards. Refer all
servicing to qualified service personnel.
22. When replacement parts are required, be sure
the service technician has used replacement parts
specified by the manufacturer or that have the
same characteristics as the original part.
Unauthorized substitutions may result in fire,
electric shock or other hazards.
23. Upon completion of any service or repairs to
this product, ask the service technician to perform
safety checks to determine that the product is in
proper operating condition.
24. The product should be mounted to a wall or
ceiling only as recommended by the manufacturer.
Figure A.
Example of Antenna Grounding as per
National Electrical Code ANSI/NFPA 70
Antenna Lead-In Wire
Ground Clamp
Antenna Discharge Unit (NEC Section 810-20)
Grounding Conductors (NEC Section 810-21)
Electric Service Equipment
Ground Clamps
Power Service Grounding Electrode System
(NEC Art. 250, Part H)
Infinity PS-8
The Infinity PS-8 powered subwoofer continues Infinity’s
longstanding commitment to accurate sound reproduction. Our
proprietary technology and engineering resources work together
to deliver uncompromised low-frequency performance in any
stereo or multichannel home theater.
Unpacking the Subwoofer
If you suspect damage from transit, report it immediately to your
dealer. Keep the shipping carton and packing materials for
future use.
Since the installation of a subwoofer can be somewhat more
complicated than installing full-range speakers, it is essential
that you read this section very carefully prior to connecting the
subwoofer to your system. Should you have questions relating to
your installation, it is advisable to call either your dealer or
Infinity’s Customer Service Department for advice.
The performance of the subwoofer is directly related to its
placement in the listening room and how you align the subwoofer
with its satellite speakers. Setting the volume of the subwoofer in
relationship to the left and right speakers is also of critical
importance because it is essential that the subwoofer integrate
smoothly with the entire system. Setting the subwoofer’s volume
level too high will result in an overpowering, boomy bass. Setting
the volume level too low will negate the benefits of the
Here are several additional facts on installation that may prove
useful. It is generally believed by most audio authorities that low
frequencies (below 125Hz) are nondirectional and, therefore,
placement of a subwoofer within any listening room is not
critical. While in theory it is true that the larger wavelengths of
extremely low frequencies are basically nondirectional, the fact
is that, when installing a subwoofer within the limited confines of
a room, reflections, standing waves and absorptions generated
within the room will strongly influence the performance of any
subwoofer system. As a result, specific location of the subwoofer
becomes important, and we strongly recommend that you
experiment with placement before choosing a final location.
Figure 1.This example shows the subwoofer positioned behind
the right-channel satellite speaker to re-create the actual
location of bass instruments in an orchestra and/or add impact
to movie soundtracks.
Placement will depend upon your room and the amount and
quality of bass required (for example, whether or not your room
permits placement of the subwoofer near either satellite). Be
sure to leave a minimum of six inches between the wall and the
port on the subwoofer.
Rear Panel
¡ Subwoofer-Level Control
™ Crossover Adjustment
£ Phase Switch
¢ LFE Input
∞ Line-Level Inputs
§ High-Level Inputs
¶ Power Switch
T 2.5A L 250V
200 Watts
If you have a Dolby* Digital or DTS® receiver/processor with a
low-frequency-effects (LFE) or subwoofer output:
If your receiver/processor does not contain a Dolby Digital or DTS
processor but has a subwoofer output:
NOTE: Some receivers have one subwoofer output.
In that case, it is recommended that you use a Y connector
(not included) to maximize performance.
If your receiver/processor does
not have subwoofer outputs for
the left and right channels or an
LFE output, connect speaker
wire from your receiver/amplifier
to your speakers and subwoofer
using two sets of speaker wire:
Front Speaker Output
This figure shows how to connect bare wires
to the terminals.
Power On
Crossover Adjustments
Plug your subwoofer’s AC cord into a wall outlet. Do not use
the outlets on the back of the receiver.
The Crossover Adjustment control ™ determines the highest
frequency at which the subwoofer reproduces sounds. If your main
speakers can comfortably reproduce some low-frequency sounds,
set this control to a lower frequency setting, between 50Hz
and 100Hz.This will concentrate the subwoofer’s efforts on the
ultradeep bass sounds required by today’s films and music. If you
are using smaller bookshelf speakers that do not extend to the
lower bass frequencies, set the Crossover Adjustment control to
a higher setting, between 120Hz and 150Hz.
Initially set the Subwoofer-Level Control ¡ to the
“min” position.
Turn on your sub by pressing the Power Switch ¶ on
the rear panel.
Turn on your entire audio system and start a CD or movie
sound-track at a moderate level.
Auto On/Standby
With the Power Switch ¶ in the ON position, the LED on the
front panel will remain lit in red or green to indicate the
On/Standby mode of the subwoofer.
RED = STANDBY (No signal detected, Amp Off)
GREEN = ON (Signal detected, Amp On)
The subwoofer will automatically enter the Standby mode after
approximately 10 minutes when no signal is detected from your
system.The subwoofer will then power ON instantly when a
signal is detected. During periods of normal use, the Power
Switch ¶ can be left on.You may turn off the Power Switch ¶
for extended periods of nonoperation, e.g., when you are
away on vacation.
Adjust Level
Turn your Subwoofer-Level Control ¡ up to the “5” position
(halfway). If no sound emanates from the subwoofer, check the ACline cord and input cables.Are the connectors on the cables
making proper contact? Is the AC plug connected to a “live”
receptacle? Has the Power Switch ¶ been pressed to the “On”
position? Once you have confirmed that the subwoofer is active,
proceed by playing a CD, record or cassette. Use a selection that
has ample bass information.
Set the overall volume control of the preamplifier or stereo to a
comfortable level. Adjust the Subwoofer-Level Control ¡ until
you obtain a pleasing blend of bass. Bass response should not
overpower the room but rather be adjusted so there is a
harmonious blend across the entire musical range. Many
users have a tendency to set the subwoofer volume too loud,
adhering to the belief that a subwoofer is there to produce lots
of bass.This is not entirely true. A subwoofer is there to enhance
bass, extending the response of the entire system so the bass
can be felt as well as heard. However, overall balance must
be maintained or the music will not sound natural. An
experienced listener will set the volume of the subwoofer so its
impact on bass response is always there but never obtrusive.
Phase Control
The Phase Switch £ determines whether the subwoofer
speaker’s piston-like action moves in and out with the main
speakers, 0,˚ or opposite the main speakers, 180.˚Proper phase
adjustment depends on several variables such as room size,
subwoofer placement and listener position. Adjust the phase
switch to maximize bass output at the listening position.
NOTE: This control will have no effect if the LFE Input ¢ is used.
If you have a Dolby Digital or DTS processor/receiver, the Low-Pass
Frequency is set by the processor/receiver. Consult your owner’s
manual to learn how to view or change this setting.
The enclosure may be cleaned using a soft cloth to remove
fingerprints or to wipe off dust.
The grille may be gently vacuumed. Stains may be removed with
an aerosol cleaner, following its instructions. Do not use any
solvents on the grille.
All wiring connections should be inspected and cleaned or
remade periodically.The frequency of maintenance depends on
the metals involved in the connections, atmospheric conditions,
and other factors, but once per year is the minimum.
If a problem occurs, make sure that all connections are properly
made and clean. If a problem exists in one loudspeaker, reverse
the connection wires to the left and right system. If the problem
remains in the same speaker, then the fault is with the loudspeaker. If the problem appears in the opposite speaker, the
cause is in another component or cable. In the event that
your subwoofer ever needs service, contact your local
Infinity dealer or Infinity directly at 1.800.553.3332 or for a service center near you.
Frequency Response:
35Hz – 150Hz (±3dB)
Maximum Amplifier Output:
100 watts RMS
(20Hz – 150Hz
with no more than 0.1% THD)
Crossover Frequencies:
50Hz – 150Hz,
24dB/octave, continuously variable
Dimensions (H x W x D):
17-1/2" x 10-5/8" x 16-3/4"
(445mm x 270mm x 426mm)
33 lb (15kg)
Infinity continually strives to update and improve existing products, as well
as create new ones.The specifications and construction details in this
and related Infinity publications are therefore subject to change without notice.
© 2003 Harman International Industries, Incorporated
Infinity Systems, 250 Crossways Park Drive, Woodbury, NY 11797 USA 800.553.3332 (USA only)
* Trademark of Dolby Laboratories. DTS is a registered trademark of Digital Theater Systems, Inc. Infinity is a registered trademark of Harman International Industries, Incorporated.
Part No. 406-000-00895 3/03
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