User manual JBL SYN-PROJECT ARRAY

[. . . ] JBL Synthesis Four speaker systems feature the following: ® controller and amplifiers, your speaker system will deliver a state-of-the-art THX home theater experience to your living room. You will hear in your home exactly what the director and sound engineer heard in the recording studio. The system will reproduce the audio flawlessly and without distortion. ® THX ULTRA2 -LICENSED HOME AUDIO SYSTEM: When used with a THX ™ ™ FLUSH-MOUNT APPEARANCE: The S4Ai, S4VC and S4HC are designed to fit flush to your wall surface. Designers and interior decorators will be pleased by their hidden appearance and stunning performance. PURE-TITANIUM, HIGH-FREQUENCY TRANSDUCER DOME: The pure-titanium diaphragms with neodymium magnet structures are ultralight to accurately reproduce lightning-fast sounds – such as cymbal crashes – yet extremely rigid to eliminate distortion and ear fatigue. Professional LSR studio monitors, this unique structure enables Synthesis Four Series speakers to evenly disperse high frequencies, creating precise imaging over a wide listening area. ™ ® ELLIPTICAL OBLATE SPHEROIDAL (EOS) WAVEGUIDE: First developed for our JBL PURE-TITANIUM, INVERTED-DOME, MIDRANGE TRANSDUCERS (S4VC, S4HC): The midrange drivers seamlessly complement the titanium-dome tweeter and offer nearly perfect pistonic motion, which eliminates the uncontrollable flexing found in conventional cones. [. . . ] NOTE: The recommended (and factory-default) mode of operation is Bipole mode. It is highly recommended that this be the mode of operation that is used. In this mode, the phase switch must be in the OUT position for the arrays to operate correctly. To activate the Direct Radiating mode for music playback, use a 12-volt DC trigger to trigger the autoswitching relay in the loudspeakers. The input to the trigger connection is located at the bottom of the speaker, next to the speaker terminals (see Figure 8), and accepts two-conductor, #24 to #16 AWG wire. The relay is activated by a constant 12V/200mA DC signal. REAR LEFT REAR RIGHT Figure 6. 7. 1-Channel system Figure 7. Single-drive – Dipole or Bipole operation only – two-cond. speaker wire Single-drive w/Direct – Dipole or Bipole and Direct Radiating operation – two-cond. trigger wire Figure 8. Dual-drive – Bipole operation only – four-cond. speaker wire Dual-drive w/Direct – Bipole and Direct Radiating operation – four-cond. trigger wire SPEAKER INPUT #2 SPEAKER INPUT #1 S4Ai WIRING GUIDE Each S4Ai speaker can be wired in Single- or Dual-Drive mode. In the case of new construction, choose the S4PCB preconstruction bracket. 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 with hardware supplied in the speaker packing box, and can be adjusted for proper mounting depth with a variation of up to 2-1/2". The actual depth will vary depending on wall construction and acoustic materials applied to the wall surface (see Figure 14). To flush-mount the grille to the wall surface, the speaker must be recessed in the wall no more SET THIS SCREW TO WALLBOARD THICKNESS Figure 14. 10 S4VC/HC/Ai OM 8/19/08 3:26 PM Page 11 MOUNTING THE SPEAKERS than 1/4". The grille pins fit directly into the speaker cabinet via receiver bushings with 15 ft/lb of tension per pin. Use the marked speaker-depth-indicator flanges (attached to the sides of the speaker baffle) to appropriately adjust the depth from the wall surface so that the baffle is recessed 1/4". This will ensure that the grille will sit flush to the wall surface. REQUIREMENTS FOR MOUNTING OPTION 1 – NEW CONSTRUCTION: The S4PCB mounting-flange bracket must be installed before the drywall is installed in the room. Attach the included L-brackets to the speakers (see Figure 14), and attach them to the mounting flanges at the appropriate recessed distance. [. . . ] In that case, the positive terminal will be colored to correspond to the channel position, while the negative terminal will be black. It is important to connect all speakers identically: (+) on the speaker to (+) on the amplifier and (–) on the speaker to (–) on the amplifier. Wiring “out of phase” results in thin sound, weak bass and poor imaging. With the advent of multichannel surround sound systems, connecting all of the speakers in your system with the correct polarity remains equally important to preserve the proper ambience and directionality of the program material. [. . . ]