PRECISION TRANSDUCERS - Oktava

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MID-BASSL15/554KProfessional Low Frequency TransducerVery high efficiency and good linearity are distinctive features of this mid-basswoofer.Kapton former voice coil, polycotton suspensions and treated cone guarantee thevery high power handling of this transducer.PART NUMBER 11160011Features4-inch, fibreglass inside-outside copper voice coil1200 Watt continuous program power handling99 dB Sensitivity40 Hz - 2 kHz Frequency rangeApplicationsThe L15/554 is designed to be mounted in compact size bass reflex enclosures.The good combination of voice coil length, very low mass weight and suspensionscontrol makes the L15/554 a very good choice for high power 2 way systems.Thanks to a very high BL/Re ratio, small mechanical depth and a strong cone, theL15/554 is a good solution for horn loaded or hybrid horn loaded systems.M-roll damped surroundExponential damped coneCopper ring4020004220 100 1.000 10.000 20.000
8 x ø 6.5 mm holes to 45°on 371 mmGeneral Specifications121 mmø 387 mm11.5 mmNominal DiameterRated ImpedanceProgram Power 1Power handling capacity 2Sensitivity 3Frequency RangeEffective Piston DiameterMax Excursion Before Damage (peak to peak)Minimum ImpedanceVoice Coil DiameterVoice Coil MaterialVoice Coil Winding DepthNumber of layersKind of layerTop Plate ThicknessCone MaterialCone DesignSurround MaterialSurround Design380/15812006009940 - 2000325/12.844/1.737.9100/4Copper16/0.62inside/outside9/0.35No pressed pulpCurvedPolycottonM - rollmm/inchohmWattsWattsdBmm/inchmm/inchohmmm/inchmm/inchThiele - Small Parameters4SPL, 1w/1m (dB)1101009080ø 220 mmø 356 mmResonance frequencyDC resistanceMechanical factorElectrical factorTotal factorBL FactorEffective Moving MassEquivalent Cas air loadEffettive piston areaMax. linear excursion (mathematical) 5Voice - coil inductance @ 1KHzHalf-space efficiencyFsReQmsQesQtsBLMmsVasSdXmaxLe1KEff356.68.60.250.2423912270.0835.81.73.75HzohmT · mgrlitersm 2mmmH%Impedance (ohms)3161001020 100 1.000 10.000 20.000Frequency (Hz)Frequency response curve of the loudspeaker taken in a hemispherical, free field environment and mounted in aclosed box with an internal volume of 600 litres (21,2 cu.ft) enclosing the rear of the driver.Mounting InformationOverall DiameterBolt Circle DiameterBolt Hole DiameterFront Mount Baffle Cut-outRear Mount Baffle Cut-outDepthVolume occupied by the driver 6387/15.2371/14.66.5/0.3358/14.1362/14.2138/5.43.8/0.13mm/inchmm/inchmm/inchmm/inchmm/inchmm/inchliters/ft3Shipping Information20 100 1.000 10.000 20.000Frequency (Hz)Impedance magnitude curve measured in free air.Net WeightShipping Weight11.3/24.911.8/26.0Kg/LbsKg/LbsNotes to Specifications1 Program Power is defined as 3 dB greater than AES power. - 2 AES standard. - 3 Sensitivity measurement is based on a 200-2 kHz pink noise signal with input power of 2.83V @ 8 Ohms. - 4 Thiele-Small parameters are measured after a 2hour warm up period running the loudspeaker at full power handling capacity. - 5 The maximum linear excursion is calculated as: (Hvc - Hg)/2 + Hg/4 where Hvc is the voice coil depth and Hg the gap depth. - 6 Calculated for front mountingon 18 mm thick board.43
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