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Description
The LF18N408 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 LF18N408 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 optimized T-pole together with doublendemodulating rings are designed to reduce flux modulations with benefits on harmonic and intermodulation distortions while improving the transient response. 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 dB Sensitivity
- 25 Hz - 1 kHz Frequency range
- Hypervented magnetic structure for minimum power compression
- Triple roll surround and exponential cone geometry
- Double aluminum demodulation rings
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 | 25 - 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 | 38 mm / 1.5 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 |
| Demodulation Rings material | Aluminum |
| Number of Demodulation Rings | 2 |
| Spider | Single |
| Demodulation Ring | Yes |
| Thiele - small parameters | |
| Resonance frequency (Fs) | 30 Hz |
| DC resistance (Re) (ohm) | 4.30 ohm |
| Mechanical factor | 3.60 Qms |
| Electrical factor | 0.36 Qes |
| Total factor | 0.33 Qts |
| Bl factor (Bl) (T x m) | 25.70 T x m |
| Effective moving mass (Mms) | 284.0 g |
| Equivalent Cas air loaded (Vas) | 193.0 liters |
| Effective piston area (Sd) | 0.122 m2 |
| Max. linear excursion (Xmax) | 15 mm |
| Voice coil inductance @ 1kHz (Le1k) | 1.56 mH |
| Half-space efficency (Eff) | 1.57% |
| Mounting information | |
| Overall diameter | 465 mm / 18.31 inches |
| 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 | 223.5 mm / 8.8 inches |
| Diameter | 465 mm / 18.31 inches |
| Cut out diameter | 423 mm / 16.65 inches |
| Weight | 9 kg / 19.84 lbs |
| Shipping information | |
| Package Height | 270 mm / 10.63 inches |
| Package Width | 520 mm / 20.47 inches |
| Package Depth | 495 mm / 19.49 inches |
| Package Weight | 10.2 kg / 22.49 lbs |