JBL S4Ai, S4HC Mounting the Speakers, Center studs. For horizontal mounting, cross-bracing is

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SPEAKER PLACEMENT

S4Ai DUAL-DRIVE MODE

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.

ROTATE ARRAY CW

Figure 13. Rotate top baffle for vertical or horizontal orientation

Use Speaker Input #1 (see Figure 8) for the side field so that the direct-radiating tweeter for both speakers plays the correct information generated by the decoder. This can be accomplished by rotating the “diffuse array” 180 degrees from default so that the speakers mirror each other in the installation.

See Figure 13, which shows how to rotate the array, but note that for Dual-Drive mode you will need to rotate the array an additional 90 degrees from the position shown for a final position, in which the tweeter-midrange array that started out on top ends up on the bottom (and thus with the tweeter facing to the right rather than the left).

MOUNTING THE SPEAKERS

SPEAKER-MOUNTING OPTIONS

	The S4VC, S4HC and S4Ai models all use the same mounting bracket. There are two models to choose from, based
	on the type of installation. In the case of new construction,
	choose the S4PCB preconstruction bracket. For retrofit instal-
	lation, use the S4RFB. Both are sold separately. The speakers
	will fit into standard-construction 2" x 6" walls with 16" on-
	center studs. For horizontal mounting, cross-bracing is
	required; also at 16" on center. See separate instructions on
	mounting either S4PCB or S4RFB, included with the brackets.
	The speakers are directly attached to the mounting L-brackets	SET THIS
	with hardware supplied in the speaker packing box, and can	SET THIS
	with hardware supplied in the speaker packing box, and can	SCREW TO
	be adjusted for proper mounting depth with a variation of up	WALLBOARD
		THICKNESS
	to 2-1/2 inches. The actual depth will vary depending on wall
	construction and acoustic materials applied to the wall sur-
	face (see Figure 14). To flush-mount the grille to the wall	Figure 14.

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Contents S4VC, S4HC & S4Ai Contents Speaker systems feature the following IntroductionIncluded Speaker Placement Center Channel SpeakersPlacement of the surround speakers remains critical Channel SystemsS4Ai Wiring Guide S4Ai Modes of OperationBipole Mode is Typically Used When Preparing the S4Ai for the Correct Operational ModeSide Left OUT position see . SeeTable on the right side Rear LeftFace see . To flush-mount the grille to the wall Mounting the SpeakersCenter studs. For horizontal mounting, cross-bracing is SPEAKER-MOUNTING OptionsMounting the S4VC speaker using the S4PCB kit Requirements for MountingMounting S4VC speaker using the S4RFB kit Connecting the Speakers to the Rest of Your System Preparing the Hookup WireAcoustical Problems in Listening Rooms FINE-TUNING Your Audio SystemRoom Reflections Materials can be found with a small See FigureHowever, since it is not possible to Excessive USE of Absorptive MaterialsRoom Absorption for Home Theater Systems Slap EchoesRattles Piece of cloth can be placed under offending knickknacksBackground Noise BACKGROUND-NOISE Solutions Standing WavesSTANDING-WAVE Solutions Absorption STANDING-WAVE Solutions Room RatiosSTANDING-WAVE Solutions Speaker Placement An even distribution of them, so that theirSTANDING-WAVE Solutions Room Equalization Troubleshooting Troubleshooting Specifications S4VC S4HCJBL Consumer Products Crossways Park Drive Woodbury, NY

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