Description
The Eminence Definimax 4018LF 18″ driver is recommended for professional audio and bass as a low distortion subwoofer in single or multi-driver speaker designs.
Product Specifications
- Nominal Diameter: 18″
- Power Handling (RMS): 1,200 Watts
- Power Handling (max): 2400 Watts
- Impedance: 8 ohms
- Frequency Response: 31 to 200 Hz
- Sensitivity: 94.9 dB 1W/1m
- Voice Coil Diameter: 4″
- Magnet Weight: 109 oz.
Thiele-Small Parameters
- Resonant Frequency (Fs): 30 Hz
- DC Resistance (Re): 6.1 ohms
- Voice Coil Inductance (Le): 4.54 mH
- Mechanical Q (Qms): 11.95
- Electromagnetic Q (Qes): 0.35
- Total Q (Qts): 0.34
- Compliance Equivalent Volume (Vas): 9 ft.³
- Mechanical Compliance of Suspension (Cms): 0.13 mm/N
- BL Product (BL): 26.75 Tm
- Diaphragm Mass Inc. Airload (Mms): 217g
- Maximum Linear Excursion (Xmax): 8.57 mm
- Surface Area of Cone (Sd): 1188 cm²
Materials of Construction
- Cone Material: Coated Paper
- Surround Material: Cloth
- Voice Coil Wire Material: Copper
- Voice Coil Former: Kapton® / Polyimide
- Basket / Frame Material: Cast Aluminum
- Magnet Material: Ferrite
Mounting Information
- Overall Outside Diameter: 18″
- Baffle Cutout Diameter: 16.57″
- Depth: 8.13″
- # Mounting Holes: 8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
- Sealed Volume: 2.5 ft.³
- Sealed F3: 68 Hz
- Vented Volume: 4.3 ft.³
- Vented F3: 45 Hz
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