ESC 300 Sub (serv.man3) - JBL Audio User Guide / Operation Manual. Page 2

All the safety and

operating instructions should be read before
the product is operated.

The safety and 

operating instructions should be retained for
future reference.

All warnings on the 

product and in the operating instructions
should be adhered to.

All operating and

use instructions should be followed.

Unplug this product from the

wall outlet before cleaning. Do not use 
liquid cleaners or aerosol cleaners. Use a
damp cloth for cleaning.

Do not use attachments

not recommended by the product manufac-
turer, as they may cause hazards.

Do not use this

product near water – for example, near a
bathtub, wash bowl, kitchen sink or laundry
tub; in a wet basement; or near a swimming
pool; and the like.

Do not place this product on

an unstable cart, stand, tripod, bracket, or
table. The product may fall, causing serious
injury to a child or adult, and serious dam-
age to the product. Use only with a cart,
stand, tripod, bracket, or table recommended
by the manufacturer, or sold with the prod-
uct. Any mounting of the product should 
follow the manufacturer’s instructions, and
should use a mounting accessory recom-
mended by the manufacturer.

Quick stops, excessive

force, and uneven surfaces may cause the
product and cart combination to overturn.

Slots and openings in the 

cabinet are provided for ventilation and to
ensure reliable operation of the product and
to protect it from overheating, and these
openings must not be blocked or covered. 
The openings should never be blocked by 
placing the product on a bed, sofa, rug, or
other similar surface. This product should
not be placed in a built-in installation such
as a bookcase or rack unless proper ventila-
tion is provided or the manufacturer’s
instructions have been adhered to.

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.

This product

may be equipped with a polarized alter-
nating-current line plug (a plug having one
blade wider than the other). This plug will
fit into the power outlet only one way. This
is a safety feature. If you are unable to
insert the plug fully into the outlet, try
reversing the plug. If the plug should still
fail to fit, contact your electrician to replace
your obsolete outlet. Do not defeat the 
safety purpose of the polarized plug.

Power-supply

cords should be routed so that they are not
likely to be walked on or pinched by items
placed upon or against them, paying partic-
ular attention to cords at plugs, convenience
receptacles, and the point where they exit
from the product.

The power cord of the

product should be unplugged from the outlet
when left unused for long periods of time.

If an out-

side 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, connec-
tion to grounding electrodes, and require-
ments for the grounding electrode. See
Figure 1.

For added protection for this

product during a lightning storm, or when 
it is left unattended and unused for long
periods of time, unplug it from the wall out-
let and disconnect the antenna or cable sys-
tem. This will prevent damage to the product
due to lightning and power-line surges.

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.

Do not overload wall out-

lets, extension cords, or integral conve-
nience receptacles, as this can result in a
risk of fire or electric shock.

Never push

objects of any kind into this product
through openings, as they may touch dan-
gerous voltage points or short-out parts that
could result in a fire or electric shock. Never
spill liquid of any kind on the product.

Do not attempt to service

this product yourself, as opening or remov-
ing covers may expose you to dangerous
voltage or other hazards. Refer all servicing
to qualified service personnel.

Unplug this

product from the wall outlet and refer ser-
vicing to qualified service personnel under 
the following conditions:

The power-supply cord or the plug has

been damaged; or

Objects have fallen onto, or liquid has

been spilled into, the product; or

The product has been exposed to rain or

water; or

The product does not operate normally

when following the operating instructions.
Adjust only those controls that are covered
by the operating instructions, as an improper
adjustment of other controls may result in
damage and will often require extensive
work by a qualified technician to restore the
product to its normal operation; or

The product has been dropped or damaged

in any way; or

The product exhibits a distinct change 

in performance – this indicates a need for
service.

When replacement

parts are required, be sure the service tech-
nician 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.

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.

The product

should be mounted to a wall or ceiling only
as recommended by the manufacturer.

The product should be situated

away from heat sources such as radiators,
heat registers, stoves, or other products
(including amplifiers) that produce heat.

CAUTION: To prevent electric shock,

 do not remove the grounding plug 

on the power cord, or use any plug 

or extension cord that does not have 

a grounding plug provided. 

Make certain that the 

AC outlet is properly grounded. 

Do not use an adapter plug 

with this product.

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.

Part No. JBLULB 6/96

ECS300 Simply Cinema OM  7/21/98 3:06 PM  Page 2