JBL S4HC &S4Ai, S4VC, S4HC, S4Ai manual Speaker Placement, Center Channel Speakers

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SPEAKER PLACEMENT

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.

LEFT AND RIGHT SPEAKERS: If you have purchased a Synthesis Four Digital Home Theater System, then the model S4VC will serve as your front left and right main speakers.

Since the left and right speakers have been designed for maximum localization of sound, they should be placed with the center of the speakers at about the same height on screen as the actors would be, to aid in the illusion that the actors’ voices are coming directly from their on-screen images. Ideally, the speakers will be placed about 45 degrees apart from each other, viewed from the listening position, so that the distance between the speakers is the same as each speaker’s distance from the listener (see Figure 1).

CENTER CHANNEL SPEAKERS

S4VC: If you have purchased the vertical channel speaker (model S4VC) for the center position, be sure to place it vertically during installation in order to take advantage of its sound-dispersion characteristics. If you mount it horizontally, it will not provide the correct dispersion pattern. If the speaker is being used with a perforated projection screen, it should be mounted behind the center of the screen (see Figure 2). If a nonperforated projection screen, plasma display or other fixed video device is being used in the installation, the preferred center speaker is the model S4HC (below).

S4HC: If you have purchased the horizontal channel speaker (model S4HC) for the center position, be sure to position it horizontally during installation in order to take advantage of its sound-dispersion characteristics. If you mount it vertically, it will not provide the correct dispersion pattern. Although the preferred speaker model to be used with a perforated projec- tion screen is the vertical model S4VC (above), the S4HC horizontal speaker may be used instead and should be mounted behind the center of the screen. If a nonperforated projection screen, plasma display or other fixed video device is being used in the installation, then the recommended location is directly below and as close as possible to the video display (see Figure 3), although the inverse of this method will work also.

L C R

VIEWING

POSITION

FLOOR PLAN

Figure 1. 5.1-Channel system

Figure 2.

Figure 3.

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Contents S4VC, S4HC & S4Ai Contents Introduction Included Center Channel Speakers Speaker PlacementChannel Systems Placement of the surround speakers remains criticalS4Ai Modes of Operation S4Ai Wiring GuideRoom is highly reflective Bipole Mode is Typically Used WhenTable on the right side OUT position see . SeeSide Left Rear LeftCenter studs. For horizontal mounting, cross-bracing is Mounting the SpeakersFace see . To flush-mount the grille to the wall SPEAKER-MOUNTING OptionsRequirements for Mounting Mounting the S4VC speaker using the S4PCB kitMounting S4VC speaker using the S4RFB kit Preparing the Hookup Wire Connecting the Speakers to the Rest of Your SystemRoom Reflections FINE-TUNING Your Audio SystemAcoustical Problems in Listening Rooms However, since it is not possible to See FigureMaterials can be found with a small Excessive USE of Absorptive MaterialsSlap Echoes Room Absorption for Home Theater SystemsBackground Noise Piece of cloth can be placed under offending knickknacksRattles Standing Waves BACKGROUND-NOISE SolutionsSTANDING-WAVE Solutions Speaker Placement STANDING-WAVE Solutions Room RatiosSTANDING-WAVE Solutions Absorption An even distribution of them, so that theirSTANDING-WAVE Solutions Room Equalization Troubleshooting Troubleshooting S4VC S4HC SpecificationsJBL Consumer Products Crossways Park Drive Woodbury, NY