RCF LF18X401 Speaker Driver Replacement Woofer for SUB 8006-AS 4 OHM Version

Description

Replacement woofer for SUB 8006-AS (4 ohm version)

4-inch, fiberglass inside/outside copper voice coil
3000W continuous program power handling
97.5 dB Sensitivity
25 Hz – 1 kHz Frequency range
Dual Forced Hyperventing System
Dual spider design with silicon based dampening control
Triple-roll surround and corrugated straight cone geometry
Very linear frequency response characteristics, extreme high power handling while generating the lowest harmonic distortion of any comparable 18-inch transducer within its application range. The LF18X401 uses a fibre loaded cone assembly along with a high excursion triple roll surround. This combination provides remarkable strength and a peak to peak maximum excursion of 50 mm. The new dual forced hyper-venting system guarantee a very efficient voice coil ventilation for minimum power compression and incredible power handling.

Nominal Diameter
18 inch / 457 mm
Rated Impedance
8 ohm
Program Power (watt)
3000 W
Power handling capacity
1500 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
30 mm / 1.18 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)
30 Hz
DC resistance (Re) (ohm)
5.40 ohm
Mechanical factor
7.40 Qms
Electrical factor
0.31 Qes
Total factor
0.30 Qts
Bl factor (Bl) (T x m)
26.50 T x m
Effective moving mass (Mms)
215.0 g
Equivalent Cas air loaded (Vas)
274.0 liters
Effective piston area (Sd)
0.120 m2
Max. linear excursion (Xmax)
12 mm
Voice coil inductance @ 1kHz (Le1k)
0.83 mH
Half-space efficency (Eff)
2.30%

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
6.5 liters / 0.26 ft3

Height
196 mm / 7.72 inches
Diameter
465 mm / 18.31 inches
Weight
12.5 kg / 27.56 lbs