L18P400 WOOFER
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PRECISION TRANSDUCERS
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
Features
- 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
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 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 Design
Triple roll
Dual-force air ventilation
Yes
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
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
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