L18P400
WOOFER
  • 4-inch, fiberglass inside/outside copper voice coil
  • 2000W continuous program power handling
  • 97.5 dB Sensitivity
  • 25 Hz – 1 kHz Frequency range
  • 4-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
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.

Part Number:

  • 11100044
    L18P400
    8ohm
Specifications
General specifications
Cone Design:
Straight
Dual-force air ventilation:
Yes
Effective piston diameter:
395 mm / 15.55 inch
Frequency range:
25 - 1000 Hz
Kind of layers:
inside/outside
Magnets:
Ceramic
Max. Excursion Before Damage:
50 mm / 1.97 inch
Minimim Impedance:
6 ohm
Nominal Diameter:
18 inch / 457 mm
Number of layers:
2
Power handling capacity:
1000 W
Program Power:
2000 W
Rated Impedance:
8 ohm
Sensitivity:
97 dB
Spider:
Dual with silicon based damping control
Surround Design:
Triple roll
Surround Material:
Polycotton
Top Plate Thickness:
15 mm / 0.59 inch
Voice Coil Diameter:
4.0 inch / 102 mm
Voice Coil Winding Material:
Copper
Voice Coil Length:
25 mm / 0.98 inch
Mounting Information
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
Overall diameter:
465 mm / 18.31 inches
Rear mount baffle cut-out:
425 mm / 16.73 inch
Volume occupied by the driver:
6 liters / 0.24 ft3
Shipping informations
Package Depth:
500 mm / 19.69 inches
Package Height:
270 mm / 10.63 inches
Package Weight:
15.5 kg / 34.17 lbs
Package Width:
520 mm / 20.47 inches
Size
Diameter:
465 mm / 18.31 inches
Height:
206 mm / 8.11 inches
Weight:
13.5 kg / 29.76 lbs
Standard compliance
CE marking:
Yes
Thiele - small parameters
BL factor (BL):
24.60 T x m
DC resistance (Re):
5.10 ohm
Effective moving mass (Mms):
200 gr
Effettive piston area (Sd):
0.12 m2
Electrical factor (Qes):
0.29 Qes
Equivalent Cas air loaded (Vas):
340 liters
Half-space efficency (Eff):
2.63%
Max. linear excursion (Xmax):
9 mm
Mechanical factor:
7.60 Qms
Resonance frequency (Fs):
29 Hz
Total factor:
0.28 Qts
Voice coil inductance @ 1kHz (Le1k):
1.20 mH
.