Overview4-inch, fiberglass inside/outside copper voice coil 2000W continuous program power handling 97.5 dB Sensitivity 25 Hz – 1 kHz Frequency range Aluminum demodulation ring Forced air ventilation and 15mm top plate for minimum power compression Dual spider design with silicon based dampening control Triple roll surround and corrugated straight cone geometry Specifications
Incredibly linear frequency response characteristics, extreme high power handling while generating the lowest harmonic distortion of any comparable 18-inch trasducer wtihin its application range. The L18P400 uses a fibre loaded cone assembly along with a high excursion triple roll,constant geometry surround. A fully optimised T-pole design generate the minimum amount of flux modulation. The T-pole also features RCf Precision's spaced gap demodulation technology, progressively braking the voice coil, providing a much smoother transition for the moving mass as it reachees its maximum excursion limits.Forced air venting system.
Features General specifications
Nominal Diameter : 18 inch / 457 mm
Rated Impedance : 8 ohm
Program Power (watt) : 2000 W
Power handling capacity : 1000 W
Sensitivity : 97.5 dB
Frequency range : 25 - 1000 Hz
Effective piston diameter : 395 mm / 15.55 inch
Max. Excursion Before Damage : 50 mm / 1.97 inch
Minimum Impedance (ohm) : 6.5 ohm
Voice Coil Diameter : 4.0 inch / 102 mm
Voice Coil Winding Material : Copper
Voice Coil Length : 25 mm / 0.98 inch
Number of layers : 2
Kind of layers : inside/outside
Top Plate Thickness : 15 mm / 0.59 inch
Cone Design : Straight
Surround Material : Polycotton
Surround Design : Triple roll
Magnets : Ceramic
Dual-force air ventilation : Yes
Spider : 03
Thiele - small parameters
Resonance frequency (Fs) : 29 Hz
DC resistance (Re) (ohm) : 5.10 ohm
Mechanical factor : 7.60 Qms
Electrical factor : 0.29 Qes
Total factor : 0.28 Qts
Bl factor (Bl) (T x m) : 24.60 T x m
Effective moving mass (Mms) : 200.0 g
Equivalent Cas air loaded (Vas) : 340.0 liters
Effective piston area (Sd) : 0.120 m2
Max. linear excursion (Xmax) : 9 mm
Voice coil inductance @ 1kHz (Le1k) : 1.20 mH
Half-space efficency (Eff) : 2.63%
Mounting information
Overall diameter : 465 mm / 18.31 inches
Bolt circle diameter : 442-447 mm / 17.4-17.6 inch
Bolt hole diameter : 7 mm / 0.28 inch
Front mount baffle cut-out : 424 mm / 16.69 inch
Rear mount baffle cut-out : 425 mm / 16.73 inch
Volume occupied by the driver : 6 liters / 0.24 ft3
Standard compliance
Safety agency : CE compliant
Size / Weight
Height : 206 mm / 8.11 inches
Diameter : 465 mm / 18.31 inches
Weight : 13.5 kg / 29.76 lbs
Shipping information
Package Height : 270 mm / 10.63 inches
Package Width : 520 mm / 20.47 inches
Package Depth : 500 mm / 19.69 inches
Package Weight : 15.5 kg / 34.17 lbs
