User manual JBL BALBOASUB10

[. . . ] 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 outlets, extension cords, or integral convenience 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 dangerous voltage points or short-out parts, which could result in a fire or electric shock. [. . . ] Setting the subwoofer's volume level too high will result in an overpowering, boomy bass. Settingthe 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). Be sure to leave a minimum of six inches between the wall and the port on the subwoofer. PLACEMENT Since the installation of a subwoofer can be somewhat more complicated than installing 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 contact either your dealer or distributor, or visit www. jbl. com, for advice. The performance of the subwoofer is directly related to its placement in the listening room and how you align the subwoofer SUB RIGHTCHANNEL SPEAKER PRIMARY LISTENING AREA Figure 1. This example shows the subwoofer positioned in the corner to maximize bass output. 3 CONTROLS AND CONNECTIONS Rear Panel A Harman International® Company ¡ TM 0 Subwoofer-Level Control 1 Crossover Adjustment 2 Phase Switch 3 LFE Input 4 Line-Level Inputs 5 Power Indicator LED 6 Power Switch £ ¢ § ¶ FUSE T 2. 5A L 250V TYPE AC~ 120V 60HZ 200 Watts 4 SUBWOOFER CONNECTIONS Choose the Subwoofer Connection That Is Most Suitable for Your Receiver/Processor If you have a Dolby® Digital or DTS® receiver/processor with a low-frequency-effects (LFE) or subwoofer output: If your receiver/processor does not contain a Dolby Digital or DTS processor but has a subwoofer output: SUBWOOFER OR LFE OUTPUT L R NOTE: Some receivers have one subwoofer output. In that case, it is recommended that you use a Y connector (not included) to maximize performance. 5 OPERATION Power On Plug your subwoofer's AC cord into a wall outlet. Do not use the outlets on the back of the receiver. Initially set the Subwoofer-Level Control ¡ to the "min" position. Turn on your sub by pressing the Power Switch ¶ on the rear panel. Turn on your entire audio system and start a CD or movie soundtrack at a moderate level. Auto On/Standby With the Power Switch ¶ in the ON position, the LED § on the rear panel will remain lit in red or green to indicate the On/Standby mode of the subwoofer. RED = STANDBY (no signal detected, amp off) GREEN = ON (signal detected, amp on) The subwoofer will automatically enter the Standby mode after approximately 10 minutes when no signal is detected from your system. The subwoofer will then power ON instantly when a signal is detected. During periods of normal use, the Power Switch ¶ can be left on. You may turn off the Power Switch ¶ for extended periods of nonoperation, e. g. , when you are away on vacation. Adjust Level Turn your Subwoofer-Level Control ¡ up to the "5" position (halfway). [. . . ] Stains may be removed with an aerosol cleaner, following its instructions. All wiring connections should be inspected and cleaned or remade periodically. The frequency of maintenance depends on the metals involved in the connections, atmospheric conditions, and other factors, but once per year is the minimum. If a problem occurs, make sure that all connections are properly made and clean. [. . . ]