LF18X451 Woofer
Incredibly linear frequency response characteristics, the highest power handling of any comparable 18-inch transducer, the lowest power compression. The LF18X451 features a fibre loaded cone assembly along with a high excursion triple roll, constant geometry surround: this combination provides remarkable strength and a peak to peak maximum excursion of 54 mm. The new dual forced hyper-venting system guarantee a very efficient voice coil ventilation for minimum power compression and incredible power handling. A double silicon spider system ensures excellent control during large excursions. A fully optimised T-pole design generate the minimum amount of flux modulation.
Features
- 4,5 - inch fiberglas Inside/Outside copper voice coil
- 3600 Watt continuous program power handling
- 97 dB Sensitivity
- 30 Hz - 1 kHz Frequency range
- Dual Forced Hyperventing System
- Dual spider designed with silicon based damping control
- BL of 30.5 Txm to provide a faster and accurate low frequency
Specifications
General specifications
| Nominal Diameter |
18 inch / 457 mm |
| Rated Impedance |
8 ohm |
| Program Power (watt) |
3600 W |
| Power handling capacity |
1800 W |
| Sensitivity |
97.0 dB |
| Frequency range |
30 - 1000 Hz |
| Effective piston diameter |
395 mm / 15.55 inch |
| Max. Excursion Before Damage |
54 mm / 2.13 inch |
| Minimum Impedance (ohm) |
6.8 ohm |
| Voice Coil Diameter |
4.5 inch / 114 mm |
| Voice Coil Winding Material |
Copper |
| Voice Coil Length |
34 mm / 1.34 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 |
6.70 Qms |
| Electrical factor |
0.29 Qes |
| Total factor |
0.28 Qts |
| Bl factor (Bl) (T x m) |
30.50 T x m |
| Effective moving mass (Mms) |
260.0 g |
| Equivalent Cas air loaded (Vas) |
220.0 liters |
| Effective piston area (Sd) |
0.120 m2 |
| Max. linear excursion (Xmax) |
14 mm |
| Voice coil inductance @ 1kHz (Le1k) |
1.38 mH |
| Half-space efficency (Eff) |
1.90% |
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 |
424 mm / 16.69 inch |
| Volume occupied by the driver |
6.5 liters / 0.26 ft3 |
Standard compliance
| Safety agency |
CE compliant |
Size / Weight
| Height |
212 mm / 8.35 inches |
| Diameter |
465 mm / 18.31 inches |
| Weight |
15.2 kg / 33.51 lbs |
Shipping information
| Package Height |
254 mm / 10 inches |
| Package Width |
524 mm / 20.63 inches |
| Package Depth |
494 mm / 19.45 inches |
| Package Weight |
17 kg / 37.48 lbs |
