Jbl 660GTI User Manual

560GTi/660GTiCOMPETITION SPEAKER SYSTEMS60TH ANNIVERSARY EDITIONOWNER’S GUIDE

Many speaker systems are designed for on-axis listening and often include a listening window that’s ±30° from the speaker’s 0° axis. That’s great for

11Figure 20. Figure 19.WOOFER MOUNTING CONSIDERATIONS• All woofers require a rigid baffle and isolation between the front and back of the speaker for

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1469mm2-11/16"116mm4-9/16"59mm2-5/16"16mm5/8"102mm4"138mm5-7/16"152mm6"81.8mm3-7/32"128.1mm5-1/16"77.8mm3

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16123124" (102mm)12312121212

17560GTi

18660GTi

THIELE/SMALL560GTi 660GTiBL (TM) 7.6 7.56DCR (ohms) 3.07 3.48MMS(g) 14.84 17.94SD(sq cm) 86.6 132.7CMS(µm/N) 312 382VAS(l) 3.29 9.45FS(Hz) 74 60.8QES0

FOR MORE THAN 60 YEARS, JBL®HASDELIVERED PRODUCTS THAT EXEMPLIFY THE TECHNOLOGYAND EXPERTISE GAINED THROUGH A LEADERSHIP ROLE IN PROFESSIONAL SOUND RE

Harman Consumer Group, Inc.250 Crossways Park Drive, Woodbury, NY 11797 USA2, route de Tours, 72500, Château du Loir, France516.496.3400 (USA only)www

TABLE OF CONTENTSINTRODUCTION ...2SCIENCE OF JBL SPEAKER DESIGN ...4PRODUCT FEATURES ...

THERE ARE THREE STAGES IN ENGINEERING LOUDSPEAKERS AT JBL:Computer-aided design and modeling, prototyping and testing. JBL speakers are thoroughly tes

Anechoic Chambers: JBL’s anechoic chambers are expensive…butworth the investment. The baffles on the walls of the chamber absorbsound at all audible f

GTi COMPETITION SPEAKER SYSTEM TECHNOLOGY:1. Spider-Landing Vents: Minimize distortion from mechanical noise.2. Nomex®Spider: Provides linear force in

TWEETERS, WAVEGUIDES AND OPTIMALFREQUENCY RESPONSEThe dispersion pattern of the sound produced by a speaker is different at low frequencies than at hi

THE DIRECTIVITY INDEX (DI): HOW WE MEASURETHE RELATIONSHIP BETWEEN ON-AXIS RESPONSEAND OFF-AXIS RESPONSEThe Directivity Index (DI) is the ratio of the

9Figure 10.Figure 12.1K 2K 5K 10K 20Kthe tweeter’s output at low frequencies in the listening window and decreases its out-put in the off-axis respons