JBL 4344 MKII Owner's Manual

Also see for Professional Series: Technical manual Technical manual

Contents

JBL 4344 MKII Owner's Manual Manual pdf 6 page image

The job of the dividing network is to distribute the various frequencies totheir respective transducers. The network is also designed to complementcomponent location on the baffle. Slopes are chosen to match the exactresponse of each driver in its respective frequency range, as well as toensure that the high-frequency transducers are adequately protected fromdangerous low-frequency components.For the 4344MkII system, we chose our Charge-Coupled LinearDefinition™ Dividing Network. The inductors are all designed for high-current, low-distortion operation. All capacitors in the network areseries/parallel connected and operated with D.C. bias. This effectivelyenables the capacitors to operate in “Class A” mode, which substantiallyincreases sonic detail, resolution, and dynamics. The low-frequency sectionof the dividing network is mounted on a dedicated circuit board thatseparates both electrical and magnetic properties from that of themidrange and tweeter sections.Additionally, the 4344MkII’s dividing network allows for passive,bi-wire, passive bi-amp, and full active bi-amp operation. For the full activebi-amp mode we recommend the use of a high-quality electronic crossover.Dividing NetworksNo.6 – ∞– 6.5– 2.50+1.5– ∞– 6.5– 2.50+1.5– ∞– 6.5– 2.50+1.5ULTRA HIGH FREQUENCY LEVEL, dBHIGH FREQUENCY LEVEL, dBMID FREQUENCY LEVEL, dBSerial Number:Professional SeriesJBL Incorporated, Northridge, CA USAModel 4344MkIILevel adjustmentsare provided to allowprecision frequencyresponse contouring. Themidrange, high-frequency,and ultrahigh-frequencydrivers may be fine-tunedfor optimum sound in anylistening room.4344 MK 11 Manual 7/21/98 3:18 PM Page 5