JBL 660GTI - Manual (Page 11)

11
Figure 20.
Figure 19.
WOOFER MOUNTING CONSIDERATIONS
• All woofers require a rigid baffle and isolation between the front and back of the
speaker for best low-frequency extension.
• The 660GTi woofer may be used in an infinite baffle or in a small sealed enclosure
with a volume equal to or larger than 1/8 ft 3 . The 560GTi woofer may be used in
an infinite baffle or in a small sealed enclosure with a volume equal to or larger
than 1/12 ft
3 .
• The GTi competition speaker systems include a choice of grille trim. See Figure 19 to
change to the carbon fiber grille trim.
TWEETER MOUNTING CONSIDERATIONS
• Use the waveguides, if possible.
• The waveguide requires a hole 4" in diameter for mounting.
• Aim the tweeters at a point in between the two front-seat positions,
if the waveguides will be mounted in the A-pillars or kick panels.
ADJUSTING THE CROSSOVER
• If you are bi-amping the speakers, remove the jumpers, as illustrated in Figure 20.
• If you are using the waveguides, move the switch to the “Waveguide” position.
• If you are not using the waveguide, move the switch to the “No Waveguide” position.
• After installing the system, set the “Tweeter Level” switch according to your
preference.
See pages 14–19 for dimensions, mounting and wiring diagrams, Thiele/Small
parameters and performance graphs.
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Model 560GTi 660GTi
Description 5" 2-Way 6" 2-Way
professional-grade professional-grade
automotive component automotive component
speaker system speaker system
Power Handling (W peak) 500 600
Power Handling (W RMS) 125 150
Sensitivity (dB @ 2.83V) 91 92
Frequency Response (Hz) 58–30k 50–30k
Crossover Frequency (Hz) 2500 2500
Voice Coil Diameter (mm) 50 50
Voice Coil Diameter (in) 2 2
Impedance 4 ohms 4 ohms
SPECIFICATIONS
Remove
Top Cover
Remover Four Top Cover Screws
Remove Jumpers