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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. Stains may be removed with an aerosol

cleaner, following the cleaner's instructions. Do not use any solvents on the

grille.

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. The battery should be replaced approximately every

three years. Consult your JBL dealer for specific recommendations.

If a problem occurs, make sure that all connections are properly made and

clean. If a problem exists in one loudspeaker, reverse the speaker wires to

the left and right system. If the problem remains in the same speaker, then

the fault is with the loudspeaker. If the problem appears in the opposite

speaker, the cause is in another component or cable. In the event that your

4344MkII

loudspeaker system ever needs service, contact your local

JBL dealer. 

Maintenance and Service

No.

13

4344 MK 11 Manual  7/21/98 3:18 PM  Page 12

Summary of Contents for 4344 MKII

Page 1: ...P R O F E S S I O N A L S E R I E S L O U D S P E A K E R S Y S T E M 4 3 4 4 M k I I A NEW STANDARD FOR A NEW CENTURY 4344 MK 11 Manual 7 21 98 3 18 PM Page 16...

Page 2: ...ellence in engineering is successfully carried through to each individual product regardless of its application or price range As new audio concepts and technologies are pioneered the partnership of J...

Page 3: ...91329 1 800 336 4JBL 4525 USA only www jbl com 1996 JBL Incorporated JBL is a registered trademark of JBL Incorporated Printed in USA 2 97 Part No 4344MkIIOM97 Table of Contents Declaration of Confor...

Page 4: ...among 15 drivers The voice coil is 4 102mm in diameter and wound on edge from flat aluminum ribbon wire on a thermoset composite form The cone is a rigid paper composite treated with Aquaplas for stre...

Page 5: ...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 Should the material flex easily the diaphragm will...

Page 6: ...ntially increases sonic detail resolution and dynamics The low frequency section of the dividing network is mounted on a dedicated circuit board that separates both electrical and magnetic properties...

Page 7: ...l Install the battery by aligning the battery terminals with the mating terminals in the network housing Align male to female female to male terminals then snap the connectors together assuring a tigh...

Page 8: ...e best stereo image will be perceived turn the speaker to face the primary listening position Figure 2 It is normally recommended that the 4344MkII loudspeakers be positioned so that the ultrahigh fre...

Page 9: ...he 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 ad...

Page 10: ...modulate high frequencies The resulting intermodulation can create audible changes to the high frequencies even before they reach the loudspeakers By using separate cables for high and low frequencie...

Page 11: ...ifiers 3 If you have hooked up your 4344MkII loudspeakers in any of the bi wire configurations indicated it is not advisable to use additional speakers separately or simultaneously 4 As with conventio...

Page 12: ...stereo amplifiers are used one may be located near each loudspeaker to drive low and mid high frequency sections through short wire runs The external strapping bars that normally connect the 4344MkII...

Page 13: ...made 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 The battery should be replace...

Page 14: ...dance 6 ohms Crossover Frequencies 340Hz 1300Hz 8000Hz Low Frequency Transducer ME150H Mid Frequency Transducer 2123H High Frequency Transducer 275ND Ultrahigh Frequency Transducer 2405H Tuning Freque...

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