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Description
The LF18N405 is an extended low frequency with high power handling , designed to provide powerful and accurate bass frequencies with low distortion, low power compression and very high SPL. The LF18N405 uses a fibre loaded cone assembly along a large triple roll surround, this combination provides remarkable strength and control. The single spider system is specifically designed with a heavy cloth which ensures excellent control during large excursions. A fully optimised T-pole design generates the minimum amount of flux modulation. The Dual-forced air venting magnetic structure system provides a very efficient voice coil ventilation to minimize the power compression.
Features
- 4,0 - inch Inside/Outside copper voice coil
- 3000 Watt continuous program power handling
- 97.5 dB Sensitivity
- 25Hz - 1kHz Frequency range
- Hypervented magnetic structure for minimum power compression
- Triple roll surround and exponential cone geometry
Specifications
| General specifications | |
| Nominal Diameter | 18 inch / 457 mm |
| Rated Impedance | 8 ohm |
| Program Power (watt) | 3000 W |
| Power handling capacity | 1500 W |
| Sensitivity | 97.0 dB |
| Frequency range | 30 - 1000 Hz |
| Effective piston diameter | 395 mm / 15.55 inch |
| Max. Excursion Before Damage | 58 mm / 2.28 inch |
| Minimum Impedance (ohm) | 6.0 ohm |
| Voice Coil Diameter | 4.0 inch / 102 mm |
| Voice Coil Winding Material | Copper |
| Voice Coil Length | 36 mm / 1.42 inch |
| Number of layers | 2 |
| Kind of layers | inside/outside |
| Top Plate Thickness | 15 mm / 0.59 inch |
| Cone Design | Curved |
| Surround Material | Polycotton |
| Surround Design | Triple roll |
| Magnets | Neodymium |
| Hypervented magnetic structure | Yes |
| Spider | 01 |
| Thiele - small parameters | |
| Resonance frequency (Fs) | 30 Hz |
| DC resistance (Re) (ohm) | 4.90 ohm |
| Mechanical factor | 7.00 Qms |
| Electrical factor | 0.34 Qes |
| Total factor | 0.32 Qts |
| Bl factor (Bl) (T x m) | 26.50 T x m |
| Effective moving mass (Mms) | 261.0 g |
| Equivalent Cas air loaded (Vas) | 227.0 liters |
| Effective piston area (Sd) | 0.120 m2 |
| Max. linear excursion (Xmax) | 14 mm |
| Voice coil inductance @ 1kHz (Le1k) | 1.70 mH |
| Half-space efficency (Eff) | 1.70% |
| 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 | 5.5 liters / 0.22 ft3 |
| Standard compliance | |
| Safety agency | CE compliant |
| Size / Weight | |
| Height | 208 mm / 8.19 inches |
| Diameter | 465 mm / 18.31 inches |
| Weight | 8.8 kg / 19.4 lbs |
| Shipping information | |
| Package Height | 255 mm / 10.04 inches |
| Package Width | 495 mm / 19.49 inches |
| Package Depth | 525 mm / 20.67 inches |
| Package Weight | 10 kg / 22.05 lbs |