RCF - Woofer / L18P300

In production for over 10 years, the L18P300 is an industry standard. The sturdy magnetic unit, with 15 mm thick plates and specially designed suspensions ensure an excellent control of amplitude of over +/- 12 millimetres. The special cooling system with forced air ventilation offer a great heat dissipation and the minimum levels of power compression available on the market. Voice coil construction, suspensions and cone materials are upgraded in order to withstand up to a Kilowatt RMS power.

Applications
The L18P300 finds its best application in both bass reflex and band pass systems. Its capacity to reproduce extremely low frequencies along with extraordinary definition make it a no compromise woofer in its category, ideal for both live and recorded music.

4-inch Inside/outside copper voice coil
2000 Watt continuous program power handling
97 dB Sensitivity
35 Hz – 1 kHz Frequency range
Forced air ventilation and 15 mm top plate for minimum power compression
Dual spider design with silicon based dampening control
M-roll surround and exponential cone geometry

GENERAL SPECIFICATIONS
Nominal Diameter 460/18 mm/inch
Rated Impedance 8 Ohm
Program Power 2000 Watts
Power handling capacity 1000 Watts
Sensitivity 97 dB
Frequency Range 35-1000 Hz
Effective Piston Diameter 380/15 mm/inch
Maximum Excursion Before Damage (peak to peak) 40/1.6 mm/inch
Minimum Impedance 6.0 Ohm
Voice Coil Diameter 100/4 mm/inch
Voice Coil Material Copper
Voice Coil Winding Depth 23/0.9 mm/inch
Number of layers 2
Kind of layer Inside/Outside
Top Plate Thickness 15/0.6 mm/inch
Cone Material No pressed pulp
Cone Design Curved
Surround Material Polycotton
Surround Design M – roll

THIELE – SMALL PARAMETERS
Resonance frequency Fs 33 Hz
DC resistance Re 5.0 Ohm
Mechanical factor Qms 8.3
Electrical factor Qes 0.34
Total factor Qts 0.33
BL factor BL 23.5 T – m
Effective Moving Mass Mms 180 gr
Equivalent Cas air load Vas 226 liters
Effective piston area Sd 0.113 m2
Max. linear excursion (mathematical) Xmax 7.8 mm
Voice – coil inductance @ 1kHz Le1k 1.9 mH
Half-space efficiency Eff 2.30 %

MOUNTING INFORMATION
Overall Diameter 470/18.5 mm/inch
Bolt Circle Diameter 438 mm
Bolt Hole Diameter 8/0.3 mm/inch
Front Mount Baffle Cut-out 416/16.4 mm/inch
Rear Mount Baffle Cut-out 418/16.5 mm/inch
Depth 209/8.3 mm/inch
Volume occupied by the driver 6.5 liters/ft3

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