JBL 4344 MKII Owner's Manual

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Contents

JBL 4344 MKII Owner's Manual Manual pdf 5 page image

The 4344MkII also features a 10" (254mm) mid-frequency transducer.The voice coil is 3" (76mm) in diameter and wound on edge from flatcopper ribbon wire on a thermoset composite™ form. Its very high-powercapability and freedom from breakup make it an ideal midrange in a systemthat is designed to play at high levels with absolutely no signs of distress. Itmakes the transition from the woofer at 340Hz, providing excellent responsethroughout the important vocal range.Throughout the history of high-frequency transducer design, the goal ofextended frequency response has been at odds with the need for highpower handling. The 4344MkII utilizes a 2" compression driver withan Aquaplas-coated titanium dome. JBL has long chosen titanium as thematerial for its highest-quality high-frequency transducers and the4344MkII is no exception. Titanium possesses the essential requirementsfor a high-frequency transducer. First, titanium is extremely light, yetrigid. The goal is to maintain a piston-like action as high in frequency aspossible. Should the material flex easily, the diaphragm will break up intorandom vibrations. Second, titanium is virtually immune to fatigue,unaffected by the cumulative effect of millions of flexures over longoperating periods. These factors coupled with the higher power handlingthat titanium affords, allow us to produce an extremely smooth high-frequency transducer with extended frequency response that can handle allthe demands of today’s digital programs. The Horn/Lens assembly ensurescontrolled distribution of the high frequencies, resulting in a wide sound-stage with pinpoint imaging.For the ultrahigh-frequency transducer, we chose a 1-3/4" compressiondriver with an edge-wound aluminum voice coil. This driver reproducesall of the ultrahigh frequencies above 8000Hz with incredible clarityand detail.High-Frequency TransducerNo.5Mid-Frequency Transducerultrahigh-Frequency Transducer4344 MK 11 Manual 7/21/98 3:18 PM Page 4