User manual JBL S4S

[. . . ] It is generally recommended that you install your S4S in-wall subwoofer along the same wall as the front loudspeakers. The S4S subwoofer is not video-shielded and should not be placed near a video display. Installing the S4S near a corner will tend to maximize low-frequency output. Be cautious when installing in a corner, to avoid a "boomy" sound. [. . . ] Use the S4S with a high-quality dedicated subwoofer amplifier as recommended by your JBL Synthesis custom installer, such as the JBL Synthesis S800. The amplifier should be capable of outputting up to 500 watts per channel with flat frequency response from 20Hz to 500Hz. Connect your main receiver or processor's line-level subwoofer output to the line-level input on your subwoofer amplifier. After you have installed the S4SBB back box enclosure as described in the next section, connect the speaker terminals on your subwoofer amplifier to the speaker input terminals in the terminal cup located on the top panel of the back box, making sure to observe the correct polarity. You will observe two wires hanging down into the opening of the S4SBB enclosure. These are to be connected to the terminals on the back of the S4S loudspeaker baffle just before installing the S4S in the enclosure. Again, remember to connect the wires to the correct terminals to maintain polarity. The solid black wire is to be connected to the negative (­) terminal on the baffle, and the solid red wire is to be connected to the positive (+) terminal on the baffle. You may prefer to use two S4S subwoofer systems in Stereo mode for improved performance and superior imaging, and to meet THX Ultra2 requirements. Use two mono subwoofer amplifiers, each connected to either the left or right subwoofer output on your receiver/processor, or use a single two-channel subwoofer amplifier and connect the left and right line-level subwoofer outputs on your receiver/processor to the corresponding inputs on your amplifier. Then connect the positive and negative terminals for each channel to one S4S subwoofer system. Wire Length Recommended Size 16-gauge Up to 20 ft. 10-gauge 4 SPEAKER CONNECTIONS Using One S4S Loudspeaker in Mono Mode Receiver/Processor Subwoofer Out Amplifier Line-Level Input Speaker-Level Outputs Top of S4SBB ­ + Using Two S4S Loudspeakers in Stereo Mode Receiver/Processor Subwoofer or Main Amp Out Amplifier Line-Level Inputs Speaker-Level Outputs Left S4S Back Box ­ Left Left + Right S4S Back Box Left ­ Right Right Right + 5 INSTALLATION A complete S4S loudspeaker system includes the S4S in-wall subwoofer and the S4SBB back box. These components are packaged separately. NOTE: The THX Ultra2 standard requires that the S4S baffle be mounted vertically. Installation requires access to the space between the wall studs. Therefore, in new-construction applications, the S4SBB back box is installed before the wallboard. For existing construction, carefully remove a section of wallboard that reveals the studs on either side of the bay where the back box will be installed, enabling the board to be screwed back onto the studs after installation is complete. Store the wallboard in a safe place until the speaker installation is complete. Included with the S4SBB: (10) 5" deck screws (10) polyurethane bushings (10) 1/4­20 flat washers (12) #8 x 3/4" wood screws (2) wood centering bars (4) #10 32 x 1-1/2" flat-head screws (2) StyrofoamTM blocks 0 Terminal Cup: Connect the speaker wires from your subwoofer amplifier to these terminals. 1 Mounting Holes for Bushings: The S4S uses a system of bushings to 1 act as springs that isolate the speaker from room and wall vibrations. Mount the bushings in each of these holes as described in Step 5 on page 7. [. . . ] · When using the Normal mode, adjust the crossover frequency on your electronics to a lower frequency. If there is no sound coming from one speaker: If there is low (or no) bass output: If the system plays at low volumes but shuts off as volume is increased: If you are hearing midrange frequencies (such as vocals) through the subwoofer: 10 SPECIFICATIONS S4S Frequency Response (­6dB) Maximum Recommended Amplifier Power Impedance Sensitivity Woofer Dimensions (H x W x D, mounted in S4SBB enclosure, not including StyrofoamTM blocks) Mounting Cutout Size (W x H) Weight per Speaker 20Hz ­ 150Hz (THX®/LFE mode) 500 Watts per channel 4 Ohms nominal 88dB (2. 83V/1m), both woofers driven Dual 10" polymer-coated aluminum cones w/rubber surrounds 64" x 14" x 5. 1" (1626mm x 356mm x 130mm) 15" x 24. 55" (381mm x 624mm) 24 lb (10. 9kg) All features and specifications are subject to change without notice. The maximum recommended amplifier power rating will ensure proper system headroom to allow for occasional peaks. We do not recommend sustained operation at these maximum power levels. JBL, Harman International, JBL Synthesis and Synthesis are trademarks of Harman International Industries, Incorporated, registered in the United States and/or other countries. [. . . ]