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Description
Incredibly linear frequency response characteristics, extreme high power handling while generating the lowest harmonic distortion of any comparable 18-inch trasducer wtihin its application range. The L18P400 uses a fibre loaded cone assembly along with a high excursion triple roll,constant geometry surround. A fully optimised T-pole design generate the minimum amount of flux modulation. The T-pole also features RCf Precision's spaced gap demodulation technology, progressively braking the voice coil, providing a much smoother transition for the moving mass as it reachees its maximum excursion limits.Forced air venting system.
Features
- 4-inch, fiberglass inside/outside copper voice coil
- 2000W continuous program power handling
- 97.5 dB Sensitivity
- 25 Hz - 1 kHz Frequency range
- Aluminum demodulation ring
- Forced air ventilation and 15mm top plate for minimum power compression
- Dual spider design with silicon based dampening control
- Triple roll surround and corrugated straight cone geometry
Specifications
| General specifications | |
| Nominal Diameter | 18 inch / 457 mm |
| Rated Impedance | 8 ohm |
| Program Power (watt) | 2000 W |
| Power handling capacity | 1000 W |
| Sensitivity | 97.5 dB |
| Frequency range | 25 - 1000 Hz |
| Effective piston diameter | 395 mm / 15.55 inch |
| Max. Excursion Before Damage | 50 mm / 1.97 inch |
| Minimum Impedance (ohm) | 6.5 ohm |
| Voice Coil Diameter | 4.0 inch / 102 mm |
| Voice Coil Winding Material | Copper |
| Voice Coil Length | 25 mm / 0.98 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) | 29 Hz |
| DC resistance (Re) (ohm) | 5.10 ohm |
| Mechanical factor | 7.60 Qms |
| Electrical factor | 0.29 Qes |
| Total factor | 0.28 Qts |
| Bl factor (Bl) (T x m) | 24.60 T x m |
| Effective moving mass (Mms) | 200.0 g |
| Equivalent Cas air loaded (Vas) | 340.0 liters |
| Effective piston area (Sd) | 0.120 m2 |
| Max. linear excursion (Xmax) | 9 mm |
| Voice coil inductance @ 1kHz (Le1k) | 1.20 mH |
| Half-space efficency (Eff) | 2.63% |
| 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 | 6 liters / 0.24 ft3 |
| Standard compliance | |
| Safety agency | CE compliant |
| Size / Weight | |
| Height | 206 mm / 8.11 inches |
| Diameter | 465 mm / 18.31 inches |
| Weight | 13.5 kg / 29.76 lbs |
| Shipping information | |
| Package Height | 270 mm / 10.63 inches |
| Package Width | 520 mm / 20.47 inches |
| Package Depth | 500 mm / 19.69 inches |
| Package Weight | 15.5 kg / 34.17 lbs |