Instruction/ maintenance manual of the product 560GTI JBL
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560GT i/660GT i COMPETITION SPEAKER SYSTEMS 60TH ANNIVERSARY EDITION OWNER’S GUIDE.
FOR MORE THAN 60 YEARS , JBL ® HAS DELIVERED PRODUCTS THA T EXEMPLIFY THE TECHNOLOGY AND EXPERTISE GAINED THROUGH A LEADERSHIP ROLE IN PROFESSIONAL SOUND REPRODUCTION.
T ABLE OF CONTENTS INTRODUCTION ................................................2 SCIENCE OF JBL SPEAKER DESIGN ................4 PRODUCT FEA TURES ........................................6 SYSTEM DESIGN ............................................10 SPECIFICA TIONS .
THERE ARE THREE ST AGES IN ENGINEERING LOUDSPEAKERS A T JBL: Computer -aided design and modeling, prototyping and testing. JBL speakers are thoroughly tested and qualified at each stage to ensure that the finished product performs flawlessly .
Anechoic Chambers: JBL ’ s anechoic chambers are expensive … but worth the investment. The baffles on the walls of the chamber absorb sound at all audible frequencies. In this setting, JBL engineers can assess critical details of the speaker’ s performance without the effects of extraneous noise or reflected sound.
GTi COMPETITION SPEAKER SY STEM TECHNOLOGY : 1. Spider-Landing V ents: Minimize distortion from mechanical noise. 2. Nomex ® Spider: Provides linear force in both movement directions.
TWEETERS, W A VEGUIDES AND OPTIMAL FREQUENCY RESPONSE The dispersion pattern of the sound produced by a speaker is different at low frequencies than at high frequencies. At frequencies with wavelengths greater than the circumference of the speaker’ s cone – the speaker’ s piston range – the sound is radiated in all directions.
THE DIRECTIVITY INDEX (DI): HOW WE MEASURE THE RELA TIONSHIP BETWEEN ON-AXIS RESPONSE AND OFF-AXIS RESPONSE The Directivity Index (DI) is the ratio of the intensity of the sound in the listening window to the average of the intensity of the sound radiated at all angles (sound power).
9 Figure 10. Figure 12. 1K 2K 5K 10K 20K the tweeter’ s output at low frequencies in the listening window and decreases its out- put in the off-axis response. That’ s a much closer match to the directivity of the woofer , which is focused into the listening window in the crossover region.
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 home audio or other applications where speakers can be easily pointed at a single listener .
11 Figure 20. Figure 19. W OOFER MOUNTING CONSIDERA TIONS • All woofers require a rigid baffle and isolation between the front and back of the speaker for best low-frequency extension. • The 660GT i 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 .
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14 69mm 2-11/16" 116mm 4-9/16" 59mm 2-5/16" 16mm 5/8" 102mm 4" 138mm 5-7/16" 152mm 6" 81.8mm 3-7/32" 128.1mm 5-1/16" 77.
15 560GTi 660GTi 2x 2x 1x 2x 2x 2x 2x 2x 2x 2x 2x 12x 8x 8x 4x 8x 8x 1x 16x 2x 2x 2x 1x 2x 2x 2x 2x 2x 2x 2x 12x 8x 8x 4x 8x 8x 1x 16x 2x.
16 1 2 3 1 2 4" (102mm) 1 2 3 1 2 1 2 1 2 1 2.
17 560GTi.
18 660GTi.
THIELE/SMALL 560GT i 660GTi BL (T M ) 7.6 7.56 DCR (ohms) 3.07 3.48 M MS (g) 14.84 17.94 S D (sq cm) 86.6 132.7 C MS (µm/N) 312 382 V AS (l) 3.29 9.45 F S (Hz) 74 60.8 Q ES 0.37 0.42 Q MS 5.49 10.17 Q T 0.34 0.4 1wSPL (dB0) 87.5 89 SPL 2.83V 91.7 92.
Harman Consumer Group, Inc. 250 Crossways Park Drive, Woodbury , NY 11797 USA 2, route de T ours, 72500, Château du Loir , France 516.496.3400 (USA only) www.jbl.com THE OFFICIAL BRAND OF LIVE MUSIC. ©2007 Harman International Industries, Incorporated.
An important point after buying a device JBL 560GTI (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought JBL 560GTI yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data JBL 560GTI - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, JBL 560GTI you will learn all the available features of the product, as well as information on its operation. The information that you get JBL 560GTI will certainly help you make a decision on the purchase.
If you already are a holder of JBL 560GTI, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime JBL 560GTI.
However, one of the most important roles played by the user manual is to help in solving problems with JBL 560GTI. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device JBL 560GTI along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
