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4344 MK 11 Manual 7/21/98 3:18 PM Page 16
4344MkII
PROFESSIONAL SERIES
LOUDSPEAKER SYSTEM
A NEW STANDARD FOR A NEW CENTURY
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G N 5 I 0 T A Y 4344 MK 11 Manual 7/21/98 3:18 PM Page 14 JBL is part of the Harman International family of audio companies, a group with a common purpose: combining technology with a love of music to manufacture audio products that provide new levels of satisfaction, perform- ance and value. To promote diversity and creativity, JBL operates independently in research and development. When it comes to translating the results of these efforts into actual consumer and professional products, JBL d
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4344 MK 11 Manual 7/21/98 3:18 PM Page 2 Table of Contents Low-Frequency Transducer 4 Mid-Frequency Transducer 5 High-Frequency Transducer 5 Ultrahigh-Frequency Transducer 5 Dividing Networks 6 Battery Replacement 7 Placement 8 Speaker Connections 9 Bi-Wiring 10 Maintenance and Service 13 System Specifications 14 Declaration of Conformity We, JBL Europe A/S Kongevejen 194B DK-3460 Birkerød DENMARK JBL Consumer Products declare in own responsibility, that the loudspeakers 80 Crossways Park West
ページ4に含まれる内容の要旨
4344 MK 11 Manual 7/21/98 3:18 PM Page 3 With the Professional Series 4344MkII Loudspeakers, JBL combines the most advanced technology with a classic JBL design. These speakers continue the longstanding tradition of precise studio monitor sound for which JBL is famous. You will enjoy the benefits of a 2" high- frequency compression driver, cast frame low-frequency transducers with vented pole pieces, and JBL’s proprietary Symmetrical Field Geometry magnet design, as well as high definition d
ページ5に含まれる内容の要旨
4344 MK 11 Manual 7/21/98 3:18 PM Page 4 Mid-Frequency Transducer The 4344MkII also features a 10" (254mm) mid-frequency transducer. The voice coil is 3" (76mm) in diameter and wound on edge from flat ™ copper ribbon wire on a thermoset composite form. Its very high-power capability and freedom from breakup make it an ideal midrange in a system that is designed to play at high levels with absolutely no signs of distress. It makes the transition from the woofer at 340Hz, providing excellent res
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4344 MK 11 Manual 7/21/98 3:18 PM Page 5 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 4344MkII system, we chose our
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4344 MK 11 Manual 7/21/98 3:18 PM Page 6 Figure 1 Battery Installation Battery Replacement The battery should be replaced approximately every 2 years. This is BI-AMP accomplished as follows: BATTERY NORMAL/ BI-WIRE • Unscrew the two screws that hold the battery access cover in place. It JBL INCORPORATED 8500 Balboa Blvd., Northridge, CA USA is located on the upper portion of the dividing network, on the rear of High Frequency the speaker enclosure (Figure 1). Low Frequency • Write today’s dat
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4344 MK 11 Manual 7/21/98 3:18 PM Page 7 Figure 2 Placement Placement Position Top View Ideally the systems should be placed at least three feet from any walls. The height, at the bottom of the Lens assembly, should be at ear level. The two 3' 3' speakers should be equidistant from your primary listening position; the 10 – 15 10 – 15 distance should be determined by the distance between the speakers. We recommend that the angle between the speakers, at the listening position, be between 45° t
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4344 MK 11 Manual 7/21/98 3:18 PM Page 8 Figure 3 Connections Speaker Connections Bare Wire Connecting Method The 4344MkII loudspeakers can be connected by one of several meth- ods. The binding posts on the rear panel of the 4344MkII will accept most types of audio cable and connectors, including banana plugs and bare wire (Figure 3). Follow the hookup method that best describes your system. Standard Connections (Figure 4) Banana/Spade Connecting Method 1. For each channel, connect the red
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4344 MK 11 Manual 7/21/98 3:18 PM Page 9 Bi-Wiring The 4344MkII’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. This is called bi-wiring. 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 Intermodulati
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4344 MK 11 Manual 7/21/98 3:18 PM Page 10 Figure 5 Bi-Wire Connecting Method Bi-Wiring Connections Figures 5 through 8 show two bi-wiring options, single-stereo amplifier AMP NORMAL/ BI-WIRE and dual-stereo amplifier modes. For passive and bi-wire connections, set the switch to the Normal/Bi-Wire position (Figure 5a). Important 1. The external “strapping bars” that normally connect the 4344MkII Figure 5a Normal/Bi-Wire Position low-frequency and high-frequency terminals must be removed before
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4344 MK 11 Manual 7/21/98 3:18 PM Page 11 Figure 9 Bi-Amp Connecting Method Bi-Amping Connections AMP The optimal method of powering the 4344MkII system is with two NORMAL/ BI-WIRE amplifiers, one for low frequencies and one for the mid/high frequencies. It is necessary to use a high-quality active crossover module. Since each amplifier only drives a limited frequency range, this method allows the user to select amplifiers with the desired sonic character for low and high frequencies. Make sur
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4344 MK 11 Manual 7/21/98 3:18 PM Page 12 Maintenance and Service The 4344MkII loudspeaker systems have an oiled finish. Cleaning should be done with an untreated dust cloth. Do not use conventional furniture waxes and polishes, which are not designed for oiled finishes. 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. Do not use any solvents on the finish. The grille may be gently vacuumed. Stain
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4344 MK 11 Manual 7/21/98 3:18 PM Page 13 System Specifications Frequency Response: 30Hz – 22kHz –6dB Sensitivity: 95dB for 2.83V @ 1 meter Recommended Maximum 200 watts continuous Power Handling: 800 watts peak Nominal Impedance: 6 ohms Crossover Frequencies: 340Hz, 1300Hz, 8000Hz Low-Frequency Transducer: ME150H Mid-Frequency Transducer: 2123H No. High-Frequency Transducer: 275ND 14 Ultrahigh-Frequency Transducer: 2405H Tuning Frequency of Woofer: 32Hz Dimensions (HxWxD): 41-3/8 x 25 x 17" 1
