WOOFERL18S801

The L18S801 is the RCF classical high efficiency 18” woofer. A perfect blend ofvoice coil length, moving mass weight and suspensions control makes this transducerthe preferred solution for many speakers and rental companies. Efficient heatdissipation is ensured by forcing air out through a special vented radiator systemwhich is part of the gap, situated between the basket and the upper plate.Voice coil construction, suspensions and cone materials are upgraded in order towithstand up to 800 Watt RMS power.

Professional Low Frequency Transducer

The L18S801 finds its best application in band pass, reflex-horn and horn loadedsystems.It is a perfect compact bass reflex solution for live music, when the maximumpunch is required.It is one of the fastest transducers in its category.

Applications

4-inch, fibreglass inside-outside copper voice coil1400 Watt continuous program power handling99.5 dB Sensitivity38 Hz - 1 kHz Frequency rangeForced air ventilation and front heat sink for minimumpower compressionDual spider design with silicon based dampeningcontrolM-roll surround and exponential cone geometry

Features

100038

20 100 1.000 10.000 20.000

PART NUMBER 11100047

38

80

90

100

110

SPL,

1w/

1m (d

B)

Frequency (Hz)

20 100 1.000 10.000 20.000

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.

Frequency (Hz)

20 100 1.000 10.000 20.000

10

100

316

Impe

danc

e (o

hms)

Impedance magnitude curve measured in free air.

General Specifications

Nominal DiameterRated ImpedanceProgram PowerPower handling capacitySensitivityFrequency 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 Design

Thiele - Small Parameters

Resonance frequencyDC resistanceMechanical factorElectrical factorTotal factorBL FactorEffective Moving MassEquivalent Cas air loadEffettive piston areaMax. linear excursion (mathematical)Voice - coil inductance @ 1KHzHalf-space efficiency

Mounting Information

Overall DiameterBolt Circle DiameterBolt Hole DiameterFront Mount Baffle Cut-outRear Mount Baffle Cut-outDepthVolume occupied by the driver

Shipping Information

Net WeightShipping Weight

FsReQmsQesQtsBLMmsVasSdXmaxLe1KEff

460/188140070099.538 - 1000380/1540/1.66.3100/4Copper18.5/0.72inside/outside10/0.4No pressed pulpCurvedPolycottonM - roll

394.98.30.300.2924.51482060.1136.81.73.93

470/18.5438/17.28/0.3416/16.4418/16.5209/8.36.5/0.23

13.1/29.113.8/30.7

mm/inchohmWattsWattsdBHzmm/inchmm/inchohmmm/inch

mm/inch

mm/inch

Hzohm

T · mgrlitersm2

mmmH%

mm/inchmm/inchmm/inchmm/inchmm/inchmm/inchliters/ft3

Kg/LbsKg/Lbs

Notes to Specifications

1 Program Power is defined as 3 dB greater than AES power. - 2 AES standard. - 3 Sensitivity measurement is based on a 100-500 Hz pink noise signal with input power of 2.83V @ 8 Ohms. - 4 Thiele-Small parameters are measured after a2 hour 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.

1

2

3

4

5

6

ø 460 mm

ø 220 mm

ø 412 mm

187 mm

15 mm

8 x ø 8 mm holes to 45°on 436 mm and on 442 mm

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