JBL ES250P User Manual
JBL ES SERIES
ES150P, ES250P (120V)
OWNER’S GUIDE
®
IMPORTANT SAFETY INSTRUCTIONS
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 groundingtype plug. A polarized plug has two blades with one wider than
the other. A grounding-type plug has two blades and a third
grounding prong. The wide blade or the third prong is 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, or the apparatus has
been exposed to rain or moisture, does not operate normally or
has been dropped.
15. Do not expose this apparatus to dripping or splashing and
ensure that no objects filled with liquids, such as vases, are
placed on the apparatus.
16. To completely disconnect this apparatus from the AC Mains,
disconnect the power supply cord plug from the AC receptacle.
17. The mains plug of the power supply cord shall remain readily
operable.
18. Do not expose batteries to excessive heat such as sunshine,
fire or the like.
be of sufficient magnitude to constitute a risk of electric shock
to persons.
accompanying the product.
WARNING: To reduce the risk of fire or electric shock, do not
expose this apparatus to rain or moisture.
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
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
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INTRODUCTION
JBL®ES150P/ES250P Powered Subwoofers
For more than 60 years, JBL has been providing audio equipment to concert
halls, recording studios and movie theaters around the world, and has become
the hands-down choice of leading recording artists and sound engineers.
With the JBL ES Series, innovative technologies such as titanium-laminatedome tweeters, Elliptical Oblate Spheroidal
transducer reinforcement are available to you. Enjoy!
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.
™
(EOS) waveguides and PolyPlas
™
PLACEMENT
Since the installation of a subwoofer can be somewhat more complicated
than installation of 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 your dealer or
distributor 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 overpowering, boomy bass. Setting the volume level too low will
negate the benefits of the subwoofer.
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.
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).
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.
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