DEFINIMAX™ 4018LF 18″ High Powered Subwoofer
Recommended for professional audio and bass as a low distortion sub-woofer in single or multi-driver designs.
Click Here to Download PDF Spec Sheet
Click Here to Download PDF Cabinet Design
| SPECIFICATION | |
| Nominal Basket Diameter | 18″, 457 mm |
| Nominal Impedance* | 8 Ω |
| Power Rating* | |
| Program Power | 2400 W |
| Watts | 1200 W |
| Resonance | 30 Hz |
| Usable Frequency Range | 31 Hz – 0.2 kHz |
| Sensitivity* | 94.9 dB |
| Magnet Weight | 109 oz. |
| Gap Height | 0.375″, 9.5 mm |
| Voice Coil Diameter | 4″, 102 mm |
| THIELE & SMALL PARAMETERS | |
| Resonant Frequency (fs) | 30 Hz |
| DC Resistance (Re) | 6.1 Ω |
| Coil Inductance (Le) | 4.54m H |
| Mechanical Q (Qms) | 11.95 |
| Electromagnetic Q (Qes) | 0.35 |
| Total Q (Qts) | 0.34 |
| Compliance Equivalent Volume (Vas) | 254.71 liters / 9 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) | 1018.1 cc |
| Mechanical Compliance of Suspension (Cms) | 0.13 mm/N |
| BL Product (BL) | 26.75 T-M |
| Diaphragm Mass Inc. Airload (MMs) | 217 grams |
| Efficiency Bandwidth Product (EBP) | 86 |
| Maximum Linear Excursion (Xmax) | 8.57 mm |
| Surface Area of Cone (Sd) | 1188 cm2 |
| Maximum Mechanical Limit (Xlim) | 15.9 mm |
| MOUNTING INFORMATION | |
| Recommended Enclosure Volume | |
| Sealed | N/a |
| Vented | 99.11-226.54 liters / 3.5-8 cu.ft. |
| Driver Volume Displaced | 0.234 cu.ft. / 6.62 liters |
| Overall Diameter | 18″, 457.2 mm |
| Baffle Hole Diameter | 16.56″, 420.6 mm |
| Front Sealing Gasket | Yes |
| Rear Sealing Gasket | Yes |
| Mounting Holes Diameter | 0.28″, 7.1mm |
| Mounting Holes B.C.D. | 17.25″, 438.2mm |
| Depth | 8.13″, 206.5 mm |
| Net Weight | 24 lbs, 10.89 kg |
| Shipping Weight | 26 lbs, 11.79 kgs |
| MATERIALS OF CONSTRUCTION | |
| Coil Construction | Copper voice coil |
| Coil Former | Polyimide former |
| Magnet Composition | Ferrite magnet |
| Core Details | Undercut with aluminum shorting ring and Core Periphery Ventilation |
| Basket Materials | Die-cast aluminum basket |
| Cone Composition | Water resistant paper cone |
| Cone Edge Composition | Cloth cone edge |
| Dust Cap Composition | Water resistant treated paper dust cap |
