Infinity BU-2 Owner's Manual

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POWEREDSUBWOOFER

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Owner'sManual

Notice13'Emploi

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DONOT REMOVECOVER(ORBACK)

NOUSERSERVICEABLEPARTSINSIDE

REFERSERVICINGTOQUALIFIEDPERSONNEL

The lightning flash with arrowhead symbol, within an equilateral
triangle, is intended to alert the user to the presenceof uninsulated

"dangerous voltage" within the product's enclosure that may be of
sufficient magnitudeto constitute a risk of electricshock to persons.

Theexclamationpoint within an equilateraltriangle is intendedto alert

the user to the presence of important operating and maintenance

(servicing) instructions in the literature accompanyingthe product.

CAUTION:TOPREVENTELECTRICSHOCK,MATCHWIDEBLADEOF

PLUGTOWIDE SLOT,FULLYINSERTED.

L'6clair avec le symbole de la fl_che, plac6 dans les limites dun
triangel _quilat_ralest pr6vu pour avertir I'utilisateur de lapresencede
"tension dangereuse" non isol6e dans I'enceinte du produit qui
pourrait _tre d'une importance suffisante pour presenter un resque
d'61ectrocutionaux personnes.

Le point d'exclamation dans un triangel 6quilateral est pr_vu pour
avertir I'utilisateur de la presenced'instructions importantes pour les
op6rations et I'entretien (service) dans les manuels fournis avec
rappareli.

ATTENTION:POUREVITER LES CHOCS ELECTRIQUES, INTRODUIRE

LA LAME LAPLUS LARGE DE LA FICHE DANS LA BORNE

CORRESPONDANTEDE LA PRISE ETPOUSSER JUSQUAU FOND.

BU-2POWEREDSUBWOOFER.

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ATTENTION!

PLEASE READ THESE INSTRUCTIONS THOROUGHLY BEFORE ATTEMPTING TO OPERATE YOUR INFINITY
SUBWOOFEI_ BE SURE TO SAVE THIS MANUAL FOR FUTURE REFERENCE. ALSO SAVE YOUR BILL OF SALE, °
AS IT IS REQUIRED FOR WARRANTY SERVICE.

f

UNPACKING

Check your subwoofer carefully. If it has been damaged in
transit, report the damage immediately by calling your dealer
and/or the trucking firm that delivered it.

To prevent fire or shock hazard, DO NOT EXPOSE

THIS SUBWOOFER SYSTEM TO RAIN OR EXCESSIVE
MOISTURE. To avoid electrical shock, DO NOT OPEN
THE SUBWOOFER! There are no user serviceable parts
inside. Observe all warnings and cautions.

A FEWSUGGESTIONS

We recommend that you not operate your speakers or
subwoofer with the bass, treble and loudness controls set to

full boost. This will place undue strain on your electronics and
speakers and could damage them.

The volume control setting on your preamplifier or stereo
receiver is not a specific indication of the overall loudness level
of the speakers. The only important consideration is the
loudness level at which the system can be played regardless of

where the volume control is set.

Always turn down the volume control setting on your

preamplifier or stereo when changing a cassette or CD, or
switching inputs to AM or FM operation. Excessively loud

transients (clicks or popping sounds) can damage the satellite
speakers and possibly the subwoofer.

Whenever changing cables, pulling plugs, etc., ALWAYS

TURN OFF ALL EQUIPMENT including the Subwoofer.
This prevents transients from entering the speakers and
prevents electrical energy from reaching you. Keep all

connections out of the reach of children.

ABOUTTHIS PRODUCT

The Infinity BU-2 Powered Subwoofer has been designed to
enhance the bass frequencies of any audio system. This
subwoofer may be used with speakers of any size. Obviously,

the greatest bass enhancement will be achieved when the
subwoofer is connected with speakers which do not have the
capability to create deep bass. This subwoofer may be used
individually, or combined with another BU-2 for even more
impressive reproduction of bass frequencies (i.e., one subwoofer

near the satellite speakers and a second subwoofer behind the

primary listening area or both subwoofers up front).

The BU-2 is a self-powered system utilizing a solid state,

low frequency monophonic amplifier driving a specially
designed woofer mounted within a structurally rigid, tuned
port enclosure.

SPECIFICATIONS

FREQUENCY RESPONSE .................... 30 to 150 Hz, + 3dB

CROSSOVER FREQUENCY ........................... 50 to 200 Hz,

.............................................................. Continuously Variable

INPUT SENSITIVITY ............................... Low Level: 70 mV

..................................................................... High Level: 1.7 V

INPUT IMPEDANCE ................................ Low Level: 12 kfl

.................... _ .............................................. High Level: 5 kfl

OUTPUT ............................................................... 100 Wrms

DRIVER ............................................................... 12" Woofer

CABINET FINISH ................................................ Ebony Pica

DIMENSIONS ..................... 141/2" Wx 14%" H*x 141/2.. D

.................................. (36.8 cm W x 36.8 cm H* x 36.8 cm D)

.................................. *Does nor include 1314' (4.5 cm) for feet

POSITIONING

Since the installation of a subwoofer is somewhat more

complicated than installing full range speakers, k is essential

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

subw0ofer in relationship to the left and right speakers is also

of critical importance because it is essential that the subwoofer

integrates 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 effect of the subwoofer.

The metal plate acts as the heat sink for the subwoofer's
internal amplifier. Do not place pillows or other objects
against it.

We recommend placing the BU-2 at least. 2 to 3 feet away
from a television or a computer's disc drive system to prevent
smearing the colors of the TV picture or erasure of the
magnetic drive.

Here are several additional facts on installation which may

prove useful. It is generally believed by most audio authorities
that low frequencies (below 125 Hz) are non-directional and,
therefore, placement of a subwoofer within any listening room

is not critical. While in theory it is true that extremely low
frequencies because of their larger wave lengths are basically
non-directional, the fact is 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 subwogfer becomes important, and we strongly
recommend that you experiment with room placement before
choosing a final location.

Placement will depend upon your room and the amount

and quality of bass required. For example, if your room
permits placement of the subwoofer near either satellite.

Never place the port too close to a wall or piece of furniture, as

this will prevent the port from operating properly. Since the
port is an integral part of the subwoofer's design, it should
always be permitted free access to the listening room without
obstruction to the pressure emerging from it. Careful
experimentation will enable you to determine the best position

for the subwoofer.

Here are some useful hints:

1. Experimentation with the port direction may be useful. Ax-'-
times directing the port away from the listening area (to the
side) may be advantageous because this may create a better
blend of basswithin the listening room.

2. If bass response seems inadequate, move it closer to a wall
or corner. If bass becomes too heavy, try turning the"

subwoofer with the port facing away from the wall. This will
tend to diminish bass output.

It will take time and patience to find the most pleasing

acoustic location for your subwoofer. Testing for sonic balance
and blending should always be made for your normal listening
position using a wide range of source material. As a starting
point, initially place the subwoofer behind your right channel

satellite speaker, about 3 or 4 inches from the wall (We
suggest trying this location first because in an orchestra, the

bass instruments are usually located in the back and to the
right.) R_er to Figure 1.

BU-2SUB

RIGHT
CHANNEL

SATELLITE

PRIMARY
LISTENING
AREA'

Figure 1

IDENTIFICATIONOFCONTROLSANDCONNECTINGACPOWER

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@

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NOT8t.NTABLE FOR tN-WALI.MO_JNTING (_

@ @ @

Figure 2

Refer to Figure 2 to identify the controls of you'/-

subwoofer's internal amplifier:
O Auto Power: on/off switch for auto-sensing of audio signal
O -High Level Input and Output terminal strips
@ Low Level Input jacks: connect to preamplifier outputs "

@ Volume Control: controls volume of subwoofer

Phase: reverse/normal switch to flip audio signal polarity
Frequency: controls upper comer roll-off point

@ AC Power:.on/off switch for ac power to amplifler

Turn off your entire audio system prior to connecting your

subwooi_er. Make sure the subwoofer's ON/OFF switch is in
the "OFF" position. If using an unswitched ac outlet on your

receiver or amplifier is not possible, connect your subwoofer to
an unswitched ac wall ot_tlet.

When the Auto Power switch is set to ON (and AC Power
is also ON), the BU-2's auto-sensing circuit will automatically
turn the subwoofer on when music or voice signals are
detected. When audio is absent, the BU-2 will stay in the "on"
mode (as indicated by a green LED) for approximately
8 minutes before the auto-sensing circuit shuts down the

system (as indicated by a red LED). To defeat this feature, set
Auto Power to OFF and use the AC Power switch to turn

on/off the BU-2.

CONNECTINGYOURSUBWOOFER

OUTPUTS (Preampwithtwo I
L.(_)_)R setsofoutputs)

I

" ". ............. ... TOSATELLITE

.......... "....... "" SPEAKERAMPLIFIER

L(_)(_ R I

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LEFT

RIGHT

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Figure 3a

•There are several ways to connect your BU-2 subwoofer.

Read this section carefully to determine which method is best

suited for your installation.

The BU-2 may be fed directly with a low-level signal taken
from your preamplifier's output by using the second set of
output jacks on the rear of your preamplifier (see Figure3a). If

your preamplifier has only one set of outputs you may u_e two

(2) =Y" connectors (see Figure 3b) to connect your subwoofer.

Use standard shielded leads terminated at each end with male

RCA connectors. Connect one end of each stereo pair of leads

to your preamplifier's left and right outputs and connect the
other end to the corresponding left and right LOW LE'_EL
INPUTS (1) on the subwoofer.

NOTE: If you are using a tube preamplifier and •the

connecting leads will be longer than 10 feet (3 meters), we
recommend not using the above connection method. A tube
preamplifier may not be able to handle the capacitance
introduced by leads over 10 feet in length. Instead, try using.
the high-level connection methods listed on page 5.

3

OUTPUTS (Preampwithone I

L_) _) R setofoutputs)

I

...'-- "...

_ =Y"Connector

_ ...._oSAT_',T_

__. _ :':'"_P_"_,_,,_,_

:y ii ..

•.i_.-::::::::-_" .| .... i_

RIGHT

Figure 3b

When using a single subwoofer, you MUST use a pair q f

stereo low-level leads fromyour preamplifier's outputs. When

using two subwoofers, one for the left and another for the
right channel, connect the left preamplifier output to BOTH---_
the left and right LOW LEVEL INPUTS of the subwoofer
used for the left channel by using a Female-to-Male "Y"
connector at the subwoofer's input and the right channel
preamplifier output to both jacks of the right channel
subwoofer in the same manner (see Figure 4). If the"
preamplifier has a mono subwoofer output, you'll also need a
Male-to-Female ,yo connector to split the mono signal to the
subwoofer pair (see Figure 4).

(Preampwithmono SUB,rUT I LOUTPUTSR(PreampwithOne

subwooferoutput) OR _) (_) setofoutputs)

Male-to-Female

=Y"Connector

i"

• • ..... • • • To Right

"-..... ..---.-. ToLeft

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LEFTBU-2SUBWOOFER

Figure 4

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RIGHT

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RIGHTBU-2SUBWOOFER

4

The BU-2 subwoofer may be connected to your system
using the HIGH LEVEL INPUTS (4) on the plate located on
the rear panel of the subwoofer. Use ordinary lamp cord
maintaining proper polarity (+ to + and - to -). Attach the
lamp cord to the left and right HIGH LEVEL INPUTS on

the subwoofer and the other ends to the proper left and right
OUTPUTS on your amplifier or receiver (see Figure 5).

If you plan to use two subwoofers (one for the left and _e

other for the right channel) connect wires from the left and

right OUTPUT on your power amplifler or receiver and- ....

attach the other ends to the corresponding HIGH LEVEL
INPUTS on each subwoofer. Observe polarity (see Figure 6).

AMPLIFIER

"" OUTPUTS

" RIGHT LEFT

r+ -r-<+7

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BU-2SUBWOOFER

Figure 5

AMPLIFIER

OUTPUTS

RIGHT LEFT

r+ -IF-< +l

Figure 6

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IIIIIIIIIIIIIIIiIIIIIIIIII

LEFTBU-2SUBWOOFER

AMPLIFIER

OUTPUTS

RIGHT LEFT

f+ -IF-< +l

Depending on whether you are using one or two BU-2

subwoofers, connecting your satellites can be accomplished in
one of two ways. If you are using a single BU-2 with a pair of

satellites, connect them as shown in Figure Z

@

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° 13

BU-2

SUBWOOFER

@

RIGHTSATELLITE

Figure 7

LEFTSATELLITE

AMPLIFIER

OUTPUTS

RIGHT LEFT

[, _1--',l

@

RIGHTBU-2

SUBWOOFER

RIGHTSATELLITE

@

LEFTBU-2

SUBWOOFER

LEFTSATELLITE

If you are using two BU-2 subwoofers as a stereo pair wi_.

a pair ofsateUites, connect them as shown in Figure 8.

NOTE: The BU-2 subwoofer does not have a built-in

passive crossover which would roll off your satellites' lower-- .....

frequencies. However, the BU-2 does have a variable
frequency control that can be used to block unwanted
frequencies (between 50 "-200 Hz) from being reproduced by

the subwoofer. Where you set this control depends on the low

frequency capabilities of your satellite speakers. Adjust this °
knob to the lowest frequency that your satellite speakers were

designed to reproduce (refer to Operation, step 8).

Figure 8

OPERATION

1. Initially set the BU-2's Volume control E) (Fig. 2) to

12 o'clock.

2. Initially set the BU-2's Frequency control O (Fig. 2) to 12

o'clock.

3. Slide the BU-2's Phase switch O (Fig. 2) to the =NOM"

position (for normal polarity).

4. (Optional) Slide the BU-2's Auto Power switch O (Fig. 2)

to the =ON" position (otherwise "OFF" defeats auto-sensing).

5. Turn on your entire audio system.

6. Turn the Volume control O (Fig. 2) to its mid position. If

no sound emanates from the subwoofer after the auto-sensing

system turns it on (i.e., LED goes from red to green), check

the ac line cord and input cables. Are the connectors on the

cables making proper contact? Is the ac plug connected to a

"live" receptacle? 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.

7. Set the overall volume control of the preamplifier orstereo

to a comfortable level. Adjust the subwoofer's Volume control

O (Fig. 27-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 following 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;
otherwise, the music will not sound natural. An experienced
listener will set the volume of the subwoofer so its irfipact on
bass response is always there but is never obtrusive.

8. The Frequency control (_ (Fig. 2) sets the high frequency
roll-off, adjustable from 50 to 200 Hz. Where you set this
control depends on the low frequency capabilities of your
satellite speakers, system placement, and other factors affecting
the mid-bass region. Turn the control UP (clockwise) until

you feel there is too much" mid-bass information (around

100Hz) then back the control down a bit until that area

sounds more natural. To hear more low bass, turn the

Frequency control DOWN a bit and the Volume control UP

by about the same amount. This will increase low bass while

leaving the mid-bass sounding the same as it did before the
adjustment. To reduce low bass without changing mid-bass,
turn the Frequency control UP and the Volume control
DOWN. Alternately slide the Phase switch between "NOM'
and "REV" positions while listening to music. The selection
that sounds the best is the correct adjustment for your system.

9. Room placement of the subwoofer is the most critical

aspect of its installation. It will be necessary for you to try

various locations in your listening room before you choose the

final location. Some possible starting points include: behind
the right channel satellite speaker, along the back wall
between the satellites, along a side wall (but not too close to a
corner), or behind a couch or a chair.

In general, the closer the subwoofer is to walls anti-
corners, the greater the effect of low frequency enhancement.
Experiment with the Frequency and Volume controls in--
different locations until you are pleased with the result you

obtain from your particular application.

A WORDO.EADVICE

The lo_ Frequency rolloff and Volume controls may be set

anywhere within their rotation. However, it will be a most

unusual circumstance if you have to set the Volume control
completely clockwise. This may indicate an unbalanced
condition in your system (too much bass) or an especially large

room, or room placement may not be correct. Try several

other locations before concluding that the Volume control
must be set at maximum.

If the subwoofer is located so far from the listening area that

its effect is not as prominent as desired, try reversing the audio
signal polarity by sliding the Phase switch from NOM to REV.

OVERDRIVEPROTECTION

Automatic limiting circuitry helps prevent overdriving a

connected subwoofer by softly clipping the input signal if it
exceeds a predetermined threshold. Depending on the level,
you may or may not hear slight distortion on musical peaks.
This protection is completely automatic, with no user

adjustments. However, if you do hear distortion continuously
while playing music, the input signal level (feeding the BU-2)
may be too high and should be lowered. If this doesn't solve
the problem, verifi/the connections and check for proper
operation of other components in the audio chain.

AWORD ABOUTTONECONTROLS

The tone controls on your electronic components

(preamplifier, receiver, etc.) should be used with the utmost
discretion. Excessive boost can create severe power demands
on your power amplifier. Maximum bass boost can create a
demand for literally hundreds of watts in the bass region,

whereas, in the *flat" position, or with the tone controls
switched out of the system, your average listening level may be
impressively and realistically loud at less than 10 watts. The

remaining power capacity required is on reserve for power

peaks on sharp transients and powerful crescendos.

i

CAREOFYOURSUBWOOFER

Your Infinity subwoofer cabinet is finished with a heavy

duty, high quality vinyl which requires very little maintenance.
Keep the cabinet clean by dusting it occasionally with a damp
cloth or use a good quality furniture polish to maintain its

original luster. (When using aerosol products, always spray the
cloth, not the speaker, to prevent any of the product from'
drifting onto the electronics of the unit.)

FEEDBACK

If the bass seems boomy, or you notice a rumbling sound

when listening to record albums, the cause may be acoustic
feedback. This means that low frequency vibrations from your
speakers are regching the turntable. To help isolate the
turntable from these vibrations, place the turntable on a
heavy, solid support, as far away as possible from the

subwoofer. If you continue to experience difficulties after"
experimenting with placement, consult your Infinity dealer.

NOTE: CD players are also susceptible to acoustic

feedback and should be placed on solid supports to isolate
them acoustically. Another method to isolate the CD player is
to place it on four isolation feet available at your local dealer.

7

INCASEOFTROUBLEWITHYOURSUBWOOFER"

If the subwoofer sound is distorted, stops playing, or

otherwise seems to be malfunctioning, first determine if the

problem is in the subwoofer or the wiring and/or other audio
components. If the problem also affects the satellite speakers,

the cause is most likely in your electronics. If it is only noticed

in the subwoofer, make sure that all connecting cables are
correct and in proper working condition. Make sure the
subwoofer is plugged in and turned on.

If everything seems to be in good working order and the

subwoofer still malfunctions, DO NOT ATTEMPT ANY

REPAIRS! Contact your Infinity dealer and get the name of
the authorized Infinity service center near you. If there is no_
facility near you, contact Infinity's Customer Service
Department at [phone], or write:

Infinity Systems, Inc. - CUSTOMER SERVICE

•20630 Nordhoff St., Chatsworth, CA 91311 U.S.A.

NOTE: Do not ship your subwoofer for service without prior
approval (RETURN AUTHORIZATION), and do not ship
without enclosing a copy of your original bill-of-sale.

LIMITED WARRANTY

Who is protected by the warranty?.

Your Infinity warranty protects the original retail purchaser
and all subsequent owners, during the stated warranty period,
from any failure as a result of an original manufacturing defect
so long as: (1) your Infinity product was purchased within the

fifty United States, or purchased by military personnel from an

authorized military outlet, and (2) the original dated bill of
sale is presented whenever service is required during the
warranty period. This warranty does not apply to products
purchased elsewhere; other purchasers should contact their

local Infinity distributor for warranty information.

How long is the warranty period?

Speaker components are covered for parts and labor for a
period of five (5) years. Electronic assemblies are covered for
parts and labor for a period of one (1) year.

What does the Infinity warranty cover?

Except as specified below, this warranty covers all defects in
original materials and workmanship. The following are not
covered: damage caused by accident, misuse, abuse, neglect,
product modification; damage occurring during shipment;
damage caused by failure to follow instructions in the owner's
manual, including failure to perform recommended periodic
or routine maintenance; damage resulting from repairs by
someone not authorized by Infinity; claims based upon any
misrepresentations by the seller; and any Infinity product on

which the serial number has been altered, defaced or removed.

Who pays for what?

During the period that both parts and labor are covered by
this warranty, Infinity will pay all of the labor and material
expenses to repair a warrantable defect; during the period that
parts ONLY are covered by this warranty, Infinity will pay for
all materials to correct warranted defect, but you must pay for
the labor charges.

How can warranty service be obtained?

In the event that your Infinity product requires service,

you should first contact the Infinity dealer from whom the
product was purchased or if this is not practical, contact
Infinity directly (ATTN: Customer Service) at 20630

Nordhoff St., Chatsworth, CA 91311 U.S.A.; (818) 407-

0228. We may direct you to an authorized service center for
Infinity products or askyou to send them to us for repair. In
either case, you must present your original dated bill-of-sale to
establish warranty coverage. Do not send your product to us
without prior authorization from our Customer Service
Department.

You are responsible for transportingyour product for

repair and for payment of all shipping charges; however,
Infinity will pay the return shipping charges (in the event you
return the product to us) if the repairs are covered by
warranty. If you experience difficulty in transporting your
product or are in need of packing materials, please advise us
and we may be able to suggest alternative procedures and/or
provide adequate packing materials.

Limitation of Implied Warranties:

All implied warranties, including fitness for a particular

purpose and merchantability are limited in duration and
length to the warranty period for your product.

Limitation of Incidental or Consequential Damages:

Infinity is not responsible for any incidental or
consequential damage of any kind. Our liability is limited to
the repair or replacement,'at our option, of a defective
product. Some states do not allow limitations on how a.n

implied warranty lasts and/or do not allow the exclusion of
incidental or consequential damage, so the above limitations

or exclusions may not apply to you. This warranty gives you
specific legal rights and you may also have other rights which
vary from state to state.

NOTE: In the event that there is a difference between this
warranty and the provisions in any advertisements, product

biochures or packaging cartons, the terms of this warranty

will prevail.

IMPORTANTSAFETYINSTRUCTIONS

1) Read Instructions- All the safety and operatinginstructions should be
readbeforethe product is operated.

2) Retain Instructions - The safety and operatinginstructions should be
retainedforfuturereference.

3) Heed Warnings - All warnings on the product and in the operating
instructionsshould be adhered to.

4) FollowInstructions - Alloperatinganduse instructionsshould be
followed.

5) Cleanin_ - Ud_'ug this product from the wall oudetbeforedenning.Do

not use liquidcleanersoraerosolcleaners.Usea dampcloth for cleaning.
Exception:A product that is meant for uninterrupted serviceand that-for

some specific reason,such as the possibilityof the loss of an authorization
code for a CATVConverter, is not intended to be unpluggedby the user for
dexning or any otherpurpose, may excludethe referenceto unplugging the
product in the product in the cleaning descriptionotherwiserequired in
above5).

6) Attachments - Do not use attachments not recommendedbythe product
manufactureras theymaycause hazards.

7) Water and Moisture- Do not usethis product nearwater - forexample,

near a bath tub, washbowl,kitchen sink, orlaundrytub; in a wet basement;

ornear a swimming pool; and the like.

8) Accessories - Do not place this product on an

unstable cart, stand, tripod, bracket,ortable. The
product may fall,causingserious injury to a child

oradult, andserious damageto the product. Use
onlywith a cart, stand, tripod, bracket,or table

recommended by the manufacturer, or sold
with the product. Artymounting of the product
should follow the manufacturer'sinstructions,
and should use a mounting accessory
recommendedby the manufacturer.

9) A product and cart combination should be

moved with care. Quick stop, excessive force, and

unevensurfacesmaycausethe product and cart combination to overturn.

10) Ventilation - Slots and openings in the cabinet are provided for

vendhtion and to ensurereliableoperationof the product and to protect it
from overheating,and these openingsmust not be blocked orcovered. The

openingsshouldneverbe blockedby placing the producton a bed, sofa, rug,
or othersimilar surface. This product should not be placed in a built-in

installationsuch asa bookcaseor rackunlessproper ventilationisprovided or
the manufacturer'sinstructionshave beenadhered to.

11) Power Sources- Thisproduct should be operatedonly from the type of

powersource indicated on the marking label.If you are not sure of the type
of power supply to your home, consult your product dealeror localpower
company. For products intended to operate from battery power, orother
sources,referto theoperatinginstructions.

12) Grounding or Polarization - This product may be equipped with a

polarizedalternating-current line plug (aplug having one blade wider than
the other). This plug will fit into the power outlet only one way. This is a
safetyfeature. If you are unable to insert the plug fully inro the oudet, try
reversingtheplug. If the plug shouldstill failto fit, contactyour dectricianto
replaceyourobsoleteoudet.Do not defeatthe safetypurpose of the polarized
plug.

13) Power-CordProtection- Power-supplycords should be routed so that

they are not likely to be walked on or pinched by items placed upon or
against them, paying particular attention to cords at plugs, convenience

receptacles,andthe pointwherethey exit from theproduct.

14) Outdoor Antenna Grounding - 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, ANSIINFPA 70,

provides information with regard to proper grounding of the mast and
supportingstructur__e,grounding of the lead-in wire to an antenna discharge
unit, size for grou'nding conductors, location of antenna-discharge unit,

connection to grounding electrodes, and requirements for the grounding

dectrode. See Figure A.

Figure A _ mr_aA

n

//

J -_ _ DISCHARGE UNIT

ELECT.,C__I - I T°R

_ EDCLAMPS

• POWER SERVICE GROUNDING

ELECTRODE SYSTEM
(NEC SECTION 810-21)

15) Lightning- For added protectionfor this product duringa lightning

storm, or when it is left unattended and unused for long periodsof time,

unplug it fromthe walloutletand disconnectthe antenna or cablesystem.

This will prevent damageto the product due to lightning and power-line
surges.

16) Power Lines - An outsideantenna systemshould not be locatedin the
vicinityof overheadpower linesor other electriclight or power circuits, or
whereit canfall into suchpowerlinesor circuits.When installingan outside
antenna system,extreme care should be taken to keep from touching such
powerlinesorcircuitsas contactwith them might be fatal.

17) Overloading - Do not overloadwalloutlets,extensioncords, or integral
conveniencereceptaclesas this can resultin a riskoffire or electricshock.

18) Object and Liquid Entry- Never push objectsof any kind into this
product through openingsas they may touch dangerousvoltagepoints or
shott-out partsthat could resultin a fireor electric shock. Never spill liquid
ofany kind on theproduct.

19) Servicing- Do not attempt to servicethis product yourselfas openingor
removingcoversmay exposeyou to dangerousvoltageorotherhazards.Refer
allservicingto qualifiedservicepersonnel.

20) DamageRequiringService- Unplug this product from the walloudet
and refer servicing to qualified service personnel under the following

conditions:

a) When the power-supplycord orplugis damaged.
b) If liquidhasbeenspilled,orobjectshavefalleninto the product.

€)If the producthas beenexposedto rain or water.
d) If the product does not operatednormally by following the opdrating
instructions. Adjust only those controls that arecovered by the operating
instructions as an improper adjustment of other controls may result in
damageand willoften require extensivework by a qualified technician to
restorethe product to its normaloperation.

e) ffthe product hasbeendroppedor damagedin anyway.
t3 When tlie product exhibits a distinct change in l_erformance- thii

indicated aneedfor service.

21) RephcementParts - When replacementparks are required, be surethe

servicetechnicianhas usedreplacement'partsspecifiedbythe manufactureror
have the same characteristicsas the originalpart. Unauthorizedsubstitutions

mayresultin fire, dectricshock, or otherhazards.

22) Safety Check - Upon completion of any service or repairs to this

product, askthe servicetechnicianto perform safetychecksto determinethat
the product is in properoperatingcondition.

23) Wall or Ceiling Mounting - The product should be mounted to a wall

orceiling onlyas recommendedby the manufacturer.

24) Heat - The product should be situated awayfrom heat sourcessuch as

radiators, heat registers,stoves,orotherproducts (induding amplifiers)that
produceheat.