JBL Project EVEREST DD66000 User Manual

Also see for Project EVEREST DD66000: Datasheet User guide Brochure & specs Technical manual

Contents

grille removal

Project EVEREST DD66000even-order distortion components. All suspension elements are tailored formaximum mechanical displacement linearity.The cone is comprised of a special layered paper pulp matrix with proprietaryAquaplas ™ damping which offers more pistonic behavior throughout thewoofer’s operating bandwidth, and controlled cone breakup beyond it.A thick wall, cast aluminum frame is used to rigidly support the motor structure.This fully vented frame and motor design also serves to minimize thebackpressure under the dome and spider, which helps to reduce harmonicdistortion to even lower levels. JBL’s Vented Gap Cooling (VGC) isincorporated within the motor structure, and lowers the operating temperatureof the coil during moments of high power operation.Altogether these design factors provide reduced harmonic distortions at verylow and high acoustic output, improved power handling, reduced powercompression, and more consistent spectral balance with varying input drivelevel.476Be High Frequency Compression Driver and HornSee Figure 3The 476Be High Frequency Compression driver makes use of a 100 mmdiameter, pure Beryllium diaphragm with 99 mm aluminum Edge-wound coil,operating into JBL’s existing Rapid Flare type, Coherent Wave phasing plug.The use of an efficient Neodymium rare-earth motor structure with new CopperSleeved pole piece maintains maximum gap flux and reduced coil inductance ata minimum size and weight. The combination of these features has created adriver that can deliver superior sound quality regardless of acoustic poweroutput with very little distortion and power compression.Figure 3 – 476Be section view