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Description
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 |