18SOUND Speaker 18" 18ND9300

G$84,080.00

Eighteen Sound 18ND9300

18″ / 460 mm

Nominal diameter

30 Hz

Resonance

0.28

Q factor

96 dB

Sensitivity

± 9.5 mm

Linear excursion

1400 W

Program Power

Sensitivity (1W, 1m, infinite baffle)SPL_1W95.7dBFrequency response28 - 2500Hz

Thiele & Small parameters

Resonance frequency (free air)f_S30.0HzMechanical quality factorQ_MS7.86

Electrical quality factorQ_ES0.29

Total quality factorQ_TS0.28

Large signal parameters

Maximum linear excursionx_max9.5mmMaximum excursion before damagex_lim25.0mmAir volume displaced at x_maxV_D1159cm³Power handlingP1000WProgram powerP_max1400W

Voice Coil

Nominal impedanceZ8ΩDC resistanceR_E5.0ΩInductance (1kHz)L_E2.02mHVC Diameter100mm

Winding materialCopper

Magnet

Force factorBl24.4N/AMotor constantBl/√R_E10.9N/√W

MaterialNeodymium

Diaphragm

Effective diameter394mmEffective areaS_D1220cm²Moving massM_MS184gMoving mass (without air load)M_MD154.4g

MaterialStraight ribbed carbon fiber loaded cellulose

Suspensions

StiffnessK_MS6.67N/mmComplianceC_MS150µm/NEquivalent volume to the complianceV_AS316LMechanical resistanceR_MS4.41N·s/m

Surround materialTriple roll, Polycotton

Dimensions

Nominal diameter18″460mmOverall diameter462mmBaffle cutout diameter422mmOverall depth224mmFlange thickness26mmMounting depth198mmVolume occupied by the driver (estimated)5.3LNet weight7.6kg

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