User manual JBL SCS 20 (220-240V)

[. . . ] They should be placed at about the same height from the floor as the listeners' ears will be, or they may be angled toward the listeners. The center channel speaker should be placed slightly behind the front left and right speakers, and no more than two feet above or below the tweeters of the left and right speakers. It is often convenient to set the center speaker on top of the television set, as shown in the drawing. Use the supplied base to aim it toward the listener. The two surround speakers should be placed slightly behind the listening position and, ideally, should face each other and be at a level higher than the listeners' ears. [. . . ] With the advent of multichannel surround-sound systems, connecting all of the speakers in your system with the correct polarity remains equally important in order to preserve the proper ambience and directionality of the program material. 4 Use this installation method for Dolby Pro Logic applications (not Dolby Digital, DTS® or other digital processing), where the receiver/processor does not have a subwoofer output, or a volume-controlled preamp (line-) level output: Connect your receiver or amplifier's front left and right speaker terminals to the left and right terminals on the subwoofer that are marked "High Level In. " Connect the left and right terminals on the subwoofer that are marked "High Level Out" to the corresponding terminals on the back of your front left and right speakers. Connect your receiver or amplifier's center, left and right surround-speaker terminals to the corre-sponding terminals on the back of your center, left and right surround speakers. Left Front Center Right Front + ­ + ­ + ­ Subwoofer + OUT IN L HIGH LEVEL ­ ­R + Receiver Left Front Center Right Front + ­ + ­ + ­ Left Surround Right Surround + ­ + ­ Left Surround Right Surround + ­ + ­ 5 ENGLISH Dolby* Pro Logic* (Non-Digital) ­ Speaker Level Dolby Pro Logic (Non-Digital) ­ Line Level Use this installation method for Dolby Pro Logic applications (not Dolby Digital, DTS® or other digital processing), where the receiver/processor is equipped with a subwoofer output, or a volume-controlled Left Front + ­ ENGLISH preamp (line-) level output: Use RCA-type patch cords to connect the line-level subwoofer outputs on your receiver or amplifier to the linelevel inputs on the subwoofer. Center + ­ Right Front + ­ Subwoofer LineLevel In L R Receiver Left Front Subwoofer Out Right Front + ­ R L + ­ IMPORTANT: Do not use the LFE input on the subwoofer with Dolby Pro Logic processors. Note: If your receiver or amplifier only has one subwoofer output jack, then you will need to use a Y-connector (not included). Plug the male end of the Y-connector into your receiver or amplifier's subwoofer output jack, and connect each of the two female ends to separate RCA-type patch cords. Finally, plug the RCA-type patch cords into the line-level inputs on the subwoofer. Connect each speaker to the corresponding speaker terminals on your receiver or amplifier. Left Rear Center Right Rear + ­ + ­ + ­ Left Surround + ­ Right Surround + ­ Dolby Digital or DTS® (or Other Digital Surround Mode) Connection RECEIVER SUBWOOFER LINE LEVEL IN LFE OUT LFE INPUT L R Use this installation method for Dolby Digital, DTS® or other digital surround processors: Use the line-level input jack marked "LFE" for the LowFrequency Effects channel. Connect this jack to the LFE output or subwoofer output on your receiver or amplifier. Connect each speaker to the corresponding speaker terminals on your receiver or amplifier. Make sure that you have configured your surroundsound processor for "Subwoofer On. " The front left, front right, center and rear speakers should all be set to "Small. " Note: When using the LFE input, the subwoofer's Crossover control is NOT active, because this function is controlled by your surround processor. When using the LFE input, set the subwoofer's Volume control to "Max" and calibrate the subwoofer level along with the other speakers according to the set-up instructions in the owner's manual for your surround receiver/amplifier. 6 Press the Master Power Switch (marked Power ¡) to the ON position to use the subwoofer. When your receiver or amplifier is off, or is not sending program material to the subwoofer, the subwoofer will be in standby mode. When the subwoofer senses an audio signal, it will automatically turn itself on. If the subwoofer does not sense a signal after approximately twenty minutes, it will automatically go into standby mode. If you will be away from home for an extended period of time, or if the subwoofer will not be used, switch the Master Power switch ¡ to the "OFF" position. ¢ ¡ £ TM HIGH LEVEL +L­ ­R+ OUT IN LINE LEVEL IN LFE L 0° PHASE 180° R IMPORTANT: CONNECT STRIPED WIRE TO RED (+ ) SPEAKER TERMINAL. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AC 230V~50Hz 200 Watts The Phase Control TM determines whether the subwoofer's pistonlike action moves in and out in phase with the main speakers or opposite the main speakers. This is adjusted by pressing the button to the 0°, or 180° position. The 0° position of the phase button plays the bass signal in phase with the main speakers. The 180° position plays the bass signal 180°, or out of phase with the main speakers. Proper phase adjustment depends on several variables such as subwoofer placement and listener position. Adjust the phase switch to optimize bass output at the listening position. This switch offers the added flexibility to adjust your subwoofer for optimum performance for your specific listening conditions without having to move your speakers. If at some time in the future you happen to rearrange your listening room, and move your speakers, you should experiment with the phase switch in both positions, and leave it in the position that optimizes bass performance for your taste. Volume Volume can be adjusted using the Subwoofer Volume Control £, as shown. Crossover The crossover filter between the subwoofer and satellites can be adjusted using the Crossover Control ¢. [. . . ] · If more than one pair of main speakers is being used, check the minimum impedance requirements of your receiver/amplifier. If there is low (or no) bass output: · Make sure the connections to the left and right "Speaker Inputs" have the correct polarity (+ and ­). · Make sure the subwoofer is plugged into an active electrical outlet. · Make sure the powered subwoofer is plugged in and switched on. [. . . ]