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Table of contents for the manual
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Page 1
PROFESSIONAL SERIES LOUDSPEAKER SYSTEM 4344MkII A NEW ST ANDARD FOR A NEW CENTUR Y 4344 MK 11 Manual 7/21/98 3:18 PM Page 16[...]
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Page 2
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. T o promote diversity and creativity , JBL operates independently in research and development. When it comes to tr[...]
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Page 3
Low-Frequency T ransducer 4 Mid-Frequency T ransducer 5 High-Frequency T ransducer 5 Ultrahigh-Frequency T ransducer 5 Dividing Networks 6 Battery Replacement 7 Placement 8 Speaker Connections 9 Bi-W iring 10 Maintenance and Service 13 System Specifications 14 JBL Consumer Products 8 0 Crossways Park W est, W oodbury , NY 11 797 8 5 00 Balboa Boul[...]
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Page 4
No. 4 W ith 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. Y ou will enjoy the benefits of a 2" high- frequency compression driver , cast frame low-frequency transducer[...]
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Page 5
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[...]
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Page 6
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 adequatel[...]
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Page 7
The battery should be replaced approximately every 2 years. This is accomplished as follows: • Unscrew the two screws that hold the battery access cover in place. It is located on the upper portion of the dividing network, on the rear of the speaker enclosure (Figure 1). • W rite today’ s date, including the year , in this manual. • Install[...]
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Page 8
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 speakers should be equidistant from your primary listening position; the distance should be determined by the distance between the speakers. W e recommend that the angle between the speakers, at t[...]
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Page 9
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. 1. For each channel, connect the red (+) terminal on the 4344MkII[...]
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Page 10
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 flexibilit[...]
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Page 11
Figures 5 through 8 show two bi-wiring options, single-stereo amplifier and dual-stereo amplifier modes. For passive and bi-wire connections, set the switch to the Normal/Bi-W ire position (Figure 5a). 1. The external “strapping bars” that normally connect the 4344MkII low-frequency and high-frequency terminals must be removed before bi-wirin[...]
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Page 12
The optimal method of powering the 4344MkII system is with two 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 [...]
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Page 13
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 pre[...]
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Page 14
No. 14 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 T ransducer: ME150H Mid-Frequency T ransducer: 2123H High-Frequency T ransducer: 275ND Ultrahigh-Frequenc[...]