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Description
The LF18N451 is a very high power handling and efficiency transducer specially designed to provide powerful and accurate sub-bass frequencies with low distortion and low power compression. Ultra fast time response. The LF18N451 uses a fibre loaded cone assembly along a large triple roll surround, this combination provides remarkable strength and control. Double silicon spider sysetm ensures excellent control during large excursions. A fully optimazed T-pole design generate the minimum amount of flux modulation. The Dual-forced air venting system provides a very efficient voice coil ventilation to minimize the power compression
Features
- 4,5 - inch Inside/Outside copper voice coil
- 3000 Watt continuous program power handling
- 97.5 dB Sensitivity
- 30 Hz - 1 kHz Frequency range
- Dual-forced air ventilation for minimum power compression
- Dual spider designed with silicon based damping control
- BL of 30.2 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) | 3000 W |
| Power handling capacity | 1500 W |
| Sensitivity | 97.5 dB |
| Frequency range | 30 - 1000 Hz |
| Effective piston diameter | 395 mm / 15.55 inch |
| Max. Excursion Before Damage | 60 mm / 2.36 inch |
| Minimum Impedance (ohm) | 6.3 ohm |
| Voice Coil Diameter | 4.5 inch / 114 mm |
| Voice Coil Winding Material | Copper |
| Voice Coil Length | 26 mm / 1.02 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 |
| Dual-force air ventilation | Yes |
| Spider | Dual with silicon based damping control |
| Thiele - small parameters | |
| Resonance frequency (Fs) | 31 Hz |
| DC resistance (Re) (ohm) | 5.00 ohm |
| Mechanical factor | 6.00 Qms |
| Electrical factor | 0.25 Qes |
| Total factor | 0.24 Qts |
| Bl factor (Bl) (T x m) | 30.20 T x m |
| Effective moving mass (Mms) | 235.0 g |
| Equivalent Cas air loaded (Vas) | 245.0 liters |
| Effective piston area (Sd) | 0.120 m2 |
| Max. linear excursion (Xmax) | 9 mm |
| Voice coil inductance @ 1kHz (Le1k) | 2.60 mH |
| Half-space efficency (Eff) | 2.54% |
| 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 | 223 mm / 8.78 inches |
| Diameter | 465 mm / 18.31 inches |
| Weight | 10.5 kg / 23.15 lbs |
| Shipping information | |
| Package Height | 240 mm / 9.45 inches |
| Package Width | 510 mm / 20.08 inches |
| Package Depth | 480 mm / 18.9 inches |
| Package Weight | 12.5 kg / 27.56 lbs |