JBL SCS178 User Manual



X + 0 + Y 2

0 M H Z

O W N E R ’ S G U I D E








SCS178 (230V)






DESIGN GOAL: Bring the thrill of live performance and movie sound to the home environment by calling on JBL’s professional engineering leadership.

SATELLITE TYPE:Titanium-laminate-dome tweeter, reflex-loaded enclosure

SUBWOOFER TYPE: Bass-reflex enclosure

PORT DESIGN: FreeFlow™ flared

PROFESSIONAL REFERENCE: Cinema Loudspeaker Series





T H I S !
















Important Safety Precautions!
















Active (Powered) Products:











9. Wall or Ceiling Mounting. The product














should be mounted on a wall or ceiling only

19. Ventilation. Slots and openings in the











when and as recommended by the manu-

cabinet are provided for ventilation and to

















ensure reliable operation of the product and









10. Cleaning. Unplug this product from the

to protect it from overheating, and these











wall outlet before cleaning. Do not use liquid

openings must not be blocked or covered.



CAUTION: To prevent electric shock,







cleaners or aerosol cleaners. Use a damp

The openings should never be blocked by




do not remove the grounding plug



cloth for cleaning.

placing the product on a bed, sofa, rug, or




on the power cord, or use any plug



11. Attachments. Do not use attachments not

other similar surface. This product should not




or extension cord that does not have








recommended by the product manufacturer,

be placed in a built-in installation such

as a













a grounding plug provided.










Make certain that the



as they may cause hazards.

bookcase or rack unless proper ventilation is








AC outlet is properly grounded.



12. Replacement Parts. When replacement

provided or the manufacturer’s instructions










have been adhered to.








Do not use an adapter plug



parts are required, be sure the service tech-










Make certain that the proper space (more








with this product.



nician has used replacement parts specified








The lightning flash with arrowhead



by the manufacturer or that have the same

than 10cm) is provided both above and below





symbol, within an equilateral triangle, is



characteristics as the original part.

the unit for ventilation. If the amplifier will be





intended to alert the user to the







presence of uninsulated “dangerous



Unauthorized substitutions may result in fire,

installed in a cabinet or other enclosed area,










voltage” within the product’s enclosure



electric shock or other hazards.

make certain that there is sufficient air





that may be of sufficient magnitude to







constitute a risk of electric shock to



13. Safety Check. Upon completion of any

movement within the cabinet, with means










provided for hot air to exit and for cool air to











service or repairs to this product, ask the





The exclamation point within an



be brought in.





equilateral triangle is intended to alert



service technician to perform safety checks







Do not obstruct the ventilation slots on the





the user to the presence of important



to determine that the product is in proper





operating and maintenance (servicing)



operating condition.

top of the unit or place objects directly over





instructions in the literature







accompanying the appliance.



14. Feet/Spikes. When positioning, or moving

them. Remember, power amplifiers generate











heat, and the heatsink fins and ventilation











this product ensure that is lifted rather than











slots that form part of the cabinet are spe-







dragged across any floor/mounting surface.






cially designed to remove this heat. Placing


1. Unpacking: Check the product carefully. If

This will avoid any damage to the floor/-


other electronic equipment near these heat-


mounting surface. Attention! Products and/or


it has been damaged in transit, report the da-

dissipation systems may possibly affect the


product feet constructed of rubber or plastics


mage immediately by calling your dealer

long term reliability of both your amplifier and


may, in seldom cases, react chemically and


and/or the shipping company that delivered

the objects placed above it.


discolor treated or non-treated wooden sur-







Do not place CDs, record jackets, owner’s






faces if positioned without protection.


2. Connections: Whenever changing, con-


15. Warranty: The following conditions may

manuals or other paper on top of or beneath


necting or disconnecting signal or power

the unit or in between products containing


result in a void product warranty:


cables etc., always turn off all equipment.

amplifiers in a stack. This will block the air


a. the manufacturers serial number is remo-


This prevents transients from entering the

flow, causing degraded performance and a


equipment and prevents electrical energy

ved or forged.

possible fire hazard.


from reaching you. Keep all connections out

b. if repairs and/or modifications and/or other

20. Power Sources. This product should be


of the reach of children. Before moving the

treatments/tunings have been carried out


operated only from the type of power source


unit, be certain to disconnect any intercon-

by non-authorized personnel or


indicated on the marking label. If you are not


nection cords with

other components, and

accessories/supplements are attached,


sure of the type of power supply to your


make certain that

you disconnect any powe-

which are not approved by


home, consult your product dealer or local


red units from the

AC outlet.



power company. For products intended to


3. Read Instructions.

All the safety and

16. Warranty: The following items are not


operate from battery power, or other sources,


operating instructions should be read before

covered by the product warranty:

refer to the operating instructions.


the product is operated.





a. Damage caused by inappropriate handling

21. Grounding or Polarization. This product


4. Retain Instructions. The safety and ope-


despite clear instructions provided in the

may be equipped with a polarized alternating-


rating instructions should be retained for

owners manual.

current line plug (a plug having one blade


future reference.





b. Damage to mechanical parts (such as

wider than the other). This plug will fit into the


5. Heed Warnings. All warnings on the pro-

record-/playback heads, moving rubber

power outlet only one way. This is a safety


duct and in the operating instructions should

and plastic parts and fuses) as well as

feature. If you are unable to insert the plug


be adhered to.





results of normal wear and tear.

fully into the outlet, try reversing the plug. If


6. Follow Instructions. All operating and use

c. Damage caused by external action or

the plug should still fail to fit, contact your


instructions should be followed.


electrician to replace your obsolete outlet.


7. Water and Moisture. The product should

d. Damage caused by miss-use by user.

Do not defeat the safety purpose of the


polarized plug.


not be used near water – for example, near a



caused by excessive electrical


22. Power-Cord Protection. Power-supply


bathtub, washbowl, kitchen sink, laundry tub,

mains supply voltage or lightning strike.


in a wet basement, or near a swimming pool,

cords should be routed so that they are not


f. Damage caused by fire, water or smoke.


and the like.





likely to be walked on or pinched by items


8. Accessories. To ensure proper operation

g. Damage known to buyer prior to purchase.

placed upon or against them, paying parti-


h. Damage caused by professional employ-

cular attention to cords at plugs, con-


and to avoid the potential for safety hazards,


place the unit on a firm and level surface.

ment of home entertainment products (e.g.

venience receptacles, and the point where


When placing the unit on a shelf, be certain

for catering trade, restaurants, public ad-

they exit from the product. To avoid safety


that the shelf and any mounting hardware

dress or infinite loop announcement use

hazards, use only the power cord supplied


can support the product’s weight. Do not


with your unit. If a replacement cord is used,


place this product on an unstable cart, stand,

17. Specifications: All product specifica-

make certain that it is of a similar gauge. We


tripod, bracket, or table. The product may fall,

tions/features are subject to change without

do not recommend using extension cords


with this product. As with all electrical


causing serious injury to a child or adult, and



devices, do not run power cords under rugs


serious damage to the product. Use only with

Passive Products:


or carpets or place heavy objects on power


a cart, stand, tripod, bracket, or table recom-

18. Amplifiers: Amplifiers used to drive these


cords. Damaged power cords should be


mended by the manufacturer, or sold with the


units must deliver a sufficient output power. A

replaced immediately, by a qualified service


product. Any mounting of the product should


lack of output power may lead to amplifier-

technician, with cords meeting factory


follow the manufacturer’s instructions, and


clipping, which causes damage not covered

specifications. When disconnecting the


should use a mounting accessory recom-

by guarantee.


power cord from an AC outlet, always pull the


mended by the manufacturer.





plug; never pull the cord.















23. Non-use Periods. The power cord of

26. Damage Requiring Service. Unplug this

27. Servicing. Do not attempt to service

the product should be unplugged from the

product from the wall outlet and refer

this product yourself, as opening or

outlet when left unused for long periods of

servicing to qualified service personnel

removing covers may expose you to


under the following conditions:

dangerous voltage or other hazards. Refer

24. Lightning. For added protection for this

a. The power-supply cord or the plug has

all servicing to qualified service personnel.

product during a lightning storm, or when it

been damaged; or

28. Object and Liquid Entry. Never push

is left unattended and unused for long

b. Objects have fallen, or liquid has been

objects of any kind into this product

periods of time, unplug it from the wall

spilled into, the product; or

through openings, as they may touch

outlet and disconnect the antenna or cable

c. The product has been exposed to rain or

dangerous voltage points or short-out

system. This will prevent damage to the

parts that could result in a fire or


water; or

product due to lightning and power-line

shock. Never spill liquid of any kind on the

d. The product does not operate normally


product. The apparatus shall not be

when following the operating

25. Overloading. Do not overload wall out-

exposed to dripping or splashing and no

instructions. Adjust only those controls

lets, extension cords, or integral conven-

objects filled with liquids, such as vases,

that are covered by the operating

ience receptacles, as this can result in a

shall be placed on the apparatus.

instructions, as an improper adjustment

risk of fire or electric shock.

29. Heat. The product should be situated

of other controls may result in damage



away from heat sources such as radiators,



and will often require extensive work by



heat registers, stoves or other products



a qualified technician to restore the



(including amplifiers) that produce heat.



product to its normal operation; or



Avoid installation in extremely hot or cold



e. The product has been dropped, or the



locations, in an area that is exposed




enclosure damaged; or



direct sunlight or near heating equipment.



f. The product does not appear to operate



When positioning the product in its final



normally or exhibits a marked change in

location, make certain that it has adequate




ventilation on all sides, as well as on the




top and bottom.



For more than 50 years, JBL

We’re confident that the JBL

or office, you will once again


has been involved in every

system you have chosen will

choose JBL.





aspect of music and film

provide every note of enjoment




recording and reproduction,

that you expected – and that

JBL Consumer Products


from live performances to the

when you think about




recordings you play in your

purchasing additional audio




home, car or office.

equipment for your home, car




Four satellites for left/right

One center channel speaker.

Powered subwoofer.

front and surrounds.




Two 6.1-meter (20-foot) speaker

Three 12.2-meter (40-foot)


cables for connection from

speaker cables for connection


receiver to subwoofer.

from receiver to left and right



rear satellites and center


Two 4.6-meter (15-foot) speaker



cables for connection from



subwoofer to front speakers.






Front Speakers

Center Channel Speaker



0 – 0.6m (0 – 2 ft.)


Surround Speakers




150-180 cm


The front speakers should be

The two surround speakers

room. However, the best


placed the same distance from

should be placed slightly

reproduction of bass will be

each other as they are from the

behind the listening position

heard when the subwoofer is

listening position. They should

and, ideally, should face each

placed in a corner along the

be placed at about the same

other and be at a level higher

same wall as the front

height from the floor as the

than the listeners’ ears. If that

speakers. Experiment with

listeners’ ears will be, or they

is not possible, they may be

subwoofer placement by

may be angled toward the

placed on a wall behind the

temporarily placing the


listening position, facing for-

subwoofer in the listening


ward. The surround speakers

position and moving around the

The center channel speaker

should not call attention to

room until the bass

should be placed slightly

themselves. Experiment with

reproduction is best. Place the

behind the front left and right

their placement until you hear a

subwoofer in that location.

speakers, and no more than


ambient sound



two feet above or below the

accompanying the main



tweeters of the left and right

program material heard in the



speakers. It is often convenient

front speakers.



to set the center speaker on top

The low-frequency material



of the television set, as shown

reproduced by the subwoofer is



in the drawing.

mostly omnidirectional, and this




speaker may be placed in a




convenient location in the




+ 8 hidden pages