Related Manuals for JBL SYNTHESIS FOUR S4Ai
Summary of Contents for JBL SYNTHESIS FOUR S4Ai
- Page 1 ® YNTHESIS S4VC, S4HC & S4Ai LUSH OUNT OUDSPEAKERS WNER ’ S AND NSTALLER ANUAL ’...
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Page 2: Table Of Contents
PEAKERS MBIENT URROUND PEAKERS 5.1-C ...6 HANNEL YSTEMS 6.1-C ...6 HANNEL YSTEMS 7.1-C ...7 HANNEL YSTEMS S4Ai M ODES OF PERATION S4Ai W ...7 IRING UIDE HICH IFFUSE S THE S4Ai REPARING THE FOR THE S4Ai O – V RIENTATION... -
Page 3: Introduction
They set new benchmarks in the use of “high technology” and provide you with the experi- ence of being in the world’s greatest movie houses and concert halls – right at home! JBL Synthesis Four speaker systems feature the following: THX U ™... -
Page 4: Included
One S4VC vertical channel flush-mount loudspeaker Four mounting L-brackets with eight 1/4-20 x 3/4" screws Eight 8-32 x 1/2" screws for speaker installation One S4HC horizontal channel flush-mount loudspeaker One S4Ai multipole ambient flush-mount loudspeaker One grille with grille frame... -
Page 5: Speaker Placement
PEAKER LACEMENT Positioning your loudspeakers properly is critical in order to achieve the sonic performance of a home theater. Please read the following section and the “Fine-Tuning Your Audio System” section for guidance in correct and optimal placement. If you have purchased a Synthesis Four EFT AND IGHT PEAKERS... -
Page 6: Ambient Surround Speakers
5.1-C HANNEL YSTEMS The S4Ai multipole ambient surround speakers work optimally if they are placed as far back from the screen as the viewing chairs are. If there are two rows of chairs, these speakers should be placed between them. -
Page 7: Channel Systems
S4Ai speakers in a 7-channel system and wiring them in single-drive mode; that is one amplifier channel per S4Ai speaker. If only two S4Ai speakers can be used in a particular application, then they should be wired in dual- drive mode so as to gain the advantages of a 7-channel system. -
Page 8: Hich Iffuse Odes The Ight Ne For The Ob
PERATIONAL It will be necessary to choose which of the two diffuse modes to use at the time of installation. The S4Ai is shipped from the factory in the Bipole mode. If this is your choice and the speaker will be placed in the vertical orientation, no changes are required and the S4Ai can be directly installed into its permanent location. -
Page 9: S4Ai Orientation - V Ertical Or Horizontal
This may be neces- sary, for example, if the S4Ai is being installed in a ceiling and the joists are running from front to back in the room. -
Page 10: S4Ai Dual -Drive Mode
RIVE As the S4Ai has the capability of producing both side and rear fields from a single location in Bipole mode while dual-driven for cinema playback (see S4Ai Wiring Guide on page 7), some care must be taken when using the Direct-Radiating mode with the autoswitching trigger for music playback. -
Page 11: Requirements For Mounting
Attach the included L-brackets to the speakers (see Figure 14), and attach them to the mounting flanges at the appropriate recessed distance. The S4VC and S4HC require a minimum 6" wall depth. The S4Ai requires a minimum 4" wall depth (see Figures 15, 16 and 17). Figure 15. Mounting the S4VC speaker using the S4PCB kit Figure 17. - Page 12 : Do not attempt to install any type of mounting bracket other than the S4PCB, the S4RFB, or any other bracket that JBL may supply for these speakers in the future. Drilling holes in the product or improperly installing mounting brackets may void your JBL warranty and cause a safety hazard.
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Page 13: Connecting The Speakers To The Rest Of Your System
Both the S4VC and S4HC utilize push-style friction binding posts that can accommodate up to #10 AWG stranded wire. Since the S4Ai can be configured in three different ways, be sure to run the correct number and type of wires. Refer to the S4Ai Wiring Guide on page 7. -
Page 14: Fine -Tuning Your Audio System
JBL Synthesis Four speakers have broad dispersion in the horizontal plane in order to ensure a wide usable listening area. This design choice can induce reflec- tions off the side walls, especially in installations where they are relatively close to the front speakers. -
Page 15: Xcessive Se Of Bsorptive Aterials
UNING UDIO YSTEM However, since it is not possible to SOLUTIONS TO ROOM REFLECTIONS: “toe-in” flush-mounted speakers, the DIFFUSION AND ABSORPTION next step is the strategic placement of absorptive materials on the side walls. Loudspeaker Loudspeaker These range from commercially avail- able fiberglass and dense foam to heavy draperies and even large, overstuffed furniture. -
Page 16: Slap " Echoes
UNING UDIO The best arrangement of the absorptive and nonabsorptive surfaces in the room can be seen in Figure 24. Most of the room surfaces are relatively absorptive, with the notable exception of the rear wall and the highest portions of the other walls, which should be diffusive. -
Page 17: Rattles
UNING UDIO 6 degrees and having the ceiling rise toward the rear of the room at a comparable rate will do wonders for the room’s acoustics, if the wall design is solid and the angles are clearly intentional from the outset. ATTLES Rattles in the room are structural resonances (as opposed to standing waves, which are airborne resonances) that the system may stimulate due to its broad frequency response and wide dynamic range. -
Page 18: Background -Noise Solutions
UNING UDIO YSTEM ACKGROUND OISE OLUTIONS Many sources of noise in a home environment can be addressed simply. Locating the home theater in the basement often removes it from many household noises as well as isolating it from other family members. Taking care to completely seal windows and doors can also make a significant difference in reducing outside noise. -
Page 19: Standing -Wave Solutions Room Ratios
UNING UDIO TANDING OLUTIONS ATIOS In new construction, the best way to minimize the audibility of standing waves is to plan for an even distribution of them, so that their effects do not “pile up” on top of each other. In this regard, the ratios of room dimensions are the critical factor. -
Page 20: Standing -Wave Solutions : Room Equalization
UNING UDIO YSTEM Standing-wave energy tends to be concentrated in the corners of rooms, which is why placing a subwoofer in the cor- ner tends to increase its bass output. Because of this, it is possible to break standing waves up somewhat by “break- ing up”... -
Page 21: Troubleshooting
If the problem has followed the speaker, then contact your authorized JBL Synthesis custom installer or dealer for further assistance. If that is not possible, visit our Web site at... - Page 22 ROUBLESHOOTING YMPTOM Bass is very weak Poor or smeared imaging Indistinct dialogue Uneven surround coverage ROBABLE AUSE • Subwoofers are wired out of phase • Subwoofers have not been placed optimally • Poor room acoustics • Poor program source • Improper polarity •...
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Page 23: Specifications
10 –16-gauge All features and specifications are subject to change without notice. JBL, Harman International, JBL Synthesis and Synthesis are trademarks of Harman International Industries, Incorporated, registered in the United States and/or other countries. Elliptical Oblate Spheroidal (EOS) is a trademark of Harman International Industries, Incorporated. - Page 24 JBL Consumer Products 250 Crossways Park Drive Woodbury, NY 11797 8500 Balboa Boulevard Northridge, CA 91329 818.830.8757 www.jblsynthesis.com Part No. 361103-001 11/05 Declaration of Conformity We, Harman Consumer Group International 2, route de Tours 72500 Château du Loir France declare in own responsibility that the products described in this owner’s manual are in compliance with technical...