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RCF LF18N405 18" 1500W 8 Ohm Neodymium Loudspeaker Driver
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.
GENERAL SPECIFICATIONS:
THIELE/SMALL PARAMETERS:
MOUNTING INFORMATION:
- Nominal Diameter:460/18 mm/inch
- Rated Impedance:8 ohms
- Program Power:3000 W AES
- Power handling capacity:1500 W AES
- Sensitivity:97 dB
- Frequency Range:25 Hz - 1000 Hz
- Effective Piston Diameter:395/15.6 mm/inch
- Max Excursion Before Damage (peak to peak):58/2.28 mm/inch
- Minimum Impedance:6.0 ohms
- Voice Coil Diameter:100/4.0 mm/inch
- Voice Coil Material:Copper
- Voice Coil Winding Depth:36/1.41 mm/inch
- Number of layers:2
- Kind of layer:inside/ouside
- Top Plate Thickness:15/0.6 mm/inch
- Cone Material:No pressed pulp
- Cone Design:Curved
- Surround Material:Polycotton
- Surround Design:Triple roll
THIELE/SMALL PARAMETERS:
- Resonance frequency:30 Hz
- DC resistance:4.9 ohms
- Mechanical factor:7.0
- Electrical factor:0.34
- Total factor:0.32
- BL Factor:26.5 T · m
- Effective Moving Mass:261 g
- Equivalent Cas air load:227 liters
- Effective piston area:0.122 m²
- Max. linear excursion (mathematical):14.2 mm
- Voice - coil inductance @ 1kHz:1.7 mH
- Half-space efficiency:1.70%
MOUNTING INFORMATION:
- Overall Diameter:465/18.3 mm/inch
- Bolt Circle Diameter:442-447/17.4-17.6 mm/inch
- Bolt Hole Diameter:6.5/0.25 mm/inch
- Front Mount Baffle Cut-out:424/16.7 mm/inch
- Rear Mount Baffle Cut-out:425/16.7 mm/inch
- Depth:190/7.48 mm/inch
- Volume occupied by the driver:5.5/0.19 liters/ft³
- Net Weight:8.8/19 kg/lbs
- Shipping weight:10/22 kg/lbs
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