User manual JBL CENTURY L100

[. . . ] The Limited Edition Century Gold loudspeaker system will provide many years of superb listening pleasure. Please take a moment to read this owner's manual completely before you begin. It is solely in the interest of ensuring a perfect listening experience that we ask you to follow the setup and hookup procedures outlined in this manual. No. 2 The Limited Edition Century Gold Bookshelf Loudspeakers set a new standard for a new century. JBL combines the most advanced technology with a classic JBL design. [. . . ] Titanium possesses the essential requirements for a high-frequency transducer. First, titanium is extremely light yet rigid. The goal is to maintain a piston-like action as high in frequency as possible. If the material flexes easily, the diaphragm will break up into random vibrations. Second, titanium is virtually free from fatigue. The material is virtually immune from the cumulative effects of millions of flexures over long operating periods. These factors, coupled with the higher power handling that titanium affords, allow us to produce an extremely smooth high-frequency transducer with extended frequency response that can handle all the demands of today's digital programs. No. 4 Figure 3 050 Gold High-Frequency Transducer Titanium dome Cast zinc faceplate for less resonance 1" copper voice coil provides smooth performance and high power handling Dividing Networks The job of the dividing network is to distribute the various frequencies to their respective transducers. The network is also designed to complement component location on the baffle. Slopes are chosen to match the exact response of each driver in its respective frequency range, as well as to ensure that the high-frequency transducers are adequately protected from dangerous low-frequency components. For the Century Gold system, we chose our Charge-Coupled Linear DefinitionTM Dividing Network. The inductors are all designed for highcurrent, low-distortion operation. For each channel, connect the red (+) terminal on the Century Gold to the red (+) terminal on your amplifier. For each channel, connect the black (-) terminal on the Century Gold to the black (-) terminal on the amplifier. Connecting the systems in this manner ensures that they will operate in phase; that is, they will work together rather than in opposition. Connecting the speaker system out of phase will not cause damage but will adversely affect the speaker's sound. Figure 6 Connections Bare Wire Connecting Method JBL INCORPORATED 8500 BALBOA BLVD. NORTHRIDGE, CA USA HIGH FREQUENCY LOW FREQUENCY Banana/Spade Connecting Method JBL INCORPORATED 8500 BALBOA BLVD. NORTHRIDGE, CA USA HIGH FREQUENCY LOW FREQUENCY No. 8 Figure 7 Standard Connecting Method JBL INCORPORATED 8500 BALBOA BLVD. NORTHRIDGE, CA USA HIGH FREQUENCY LOW FREQUENCY Bi-Wiring The Century Gold's outer connection panel and internal dividing network are designed so that separate sets of speaker cable can be attached to the low-frequency transducer and midrange/high-frequency transducer portions of the dividing network. Bi-wiring can provide several sonic advantages and considerably more flexibility in power amplifier selection. The advantages of bi-wiring are as follows: Reduction of Intermodulation The majority of current flowing between an amplifier and speaker is devoted to bass reproduction. In fact, 60% or more of an amplifier's output is destined for the woofers. When current flows through a wire, it produces an electro-magnetic field (EMF) that expands and collapses at a rate equal to that of the music's complex frequency components. [. . . ] If touch-up is necessary or the finish appears to be drying out, the surface may be re-oiled with a commercially available oil-finishing preparation. Stains may be removed with an aerosol cleaner, following its instructions. All wiring connections should be inspected and cleaned or remade periodically. The frequency of maintenance depends on the metals involved in the connections, atmospheric conditions, and other factors, but once per year is the minimum. [. . . ]