JBL M9500 manual

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Table of contents for the manual

  • Page 1

    M9500 MONITOR LOUDSPEAKERS OWNERS MANUAL M9500 Version 9/14/95 7/27/98 2:58 PM Page 1[...]

  • Page 2

    GENERAL S Y STEM DESCRIPTION The JBL M9500 monitor loudspeaker system represents a refinement of the principles that have guided JBL’s high-level monitor system design over the last thirty years. In keeping with contemporary monitoring practice, the system is essentially of two-way design. A horn-compression driver section covers the frequency r[...]

  • Page 3

    Syst em Setup The M9500 systems are modular, each consisting of a stack of three separate enclosures. The larger of the bass enclosures are placed at the bottom, and the high-frequency/horn modules stack on top and are aligned by the screws that protrude on the bass section. The smaller bass modules are placed on top of the high-frequency modules a[...]

  • Page 4

    Option D, biamplification. This mode of operation requires a dedicated electronic dividing network crossing over at 650 Hz. We recommend the JBL DX-1 with internal compensation made for the M9500 system. If this mode is used, make sure that the screwdriver adjustment on the back of each network is set in the “biamp” position. High-frequency tr[...]

  • Page 5

    The JBL model 475Nd compression driver used in the M9500 has a smooth titanium dome 101 millimeters in diameter that has been lightly coated with Aquaplas™ damping compound. Its aluminum ribbon voice coil operates in a magnetic flux field of 1.65 tesla (16,500 gauss). Mid-band efficiency is 20%, while at the peak value of driver impedance it i[...]

  • Page 6

    The directivity index (DI) of the H9500 horn is shown in Figure 5. The smoothly rising DI is a consequence of the gradual narrowing of the vertical dispersion angle above 2 kHz and contributes to the overall flatness of the high-frequency response of the system. Overall system on-axis pressure response and impedance are shown in Figure 6. The contr[...]

  • Page 7

    Car e and Maintenance of the Syst em Your M9500 monitors should give years of trouble-free service. Normally, the only routine maintenance will be cleaning. The grilles may be cleaned of dust gently with a vacuum cleaner using a brush attachment. If there should be stains on the grille, a soft bristle brush moistened with a dilute mixture of water [...]

  • Page 8

    JBL continually strives to improve its products. New materials, produc- tion methods and design refinements are introduced into existing models without notice as a routine expression of our design philosophy. For this reason, JBL M9500 Series Loudspeakers may differ in some respect from their published specifications and descriptions, but will alwa[...]