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
With the JBL ES Series, innovative technologies such as
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.
PLACEMENT
Since the installation of a subwoofer can be somewhat more complicated than installation of
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 wave- lengths 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 recom- mend 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
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