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