Model: TRF SW1845 D1

Size: 18 inches

Cone: Competition Grade Paper

Surround Material: Fabric Form

Voice Coil: Made in the USA

Voice Coil Dimensions: 4.0 inches

Voice Coil Layers: 8 layers

Dust Cap: Carbon, Made in Europe

Nominal Impedance: Dual 1Ω

Voice Coil Wire: Aluminum

Spider Dimensions: 4''ID / 10''OD

Spider Material: NOMEX

Spider Layers: 2 pieces x 4 layers

RMS Power Handling: 4500W RMS

Max Power Handling: 9000W MAX

Sensitivity: 90.2dB

Resonant Frequency (f0): 32.2Hz

Mechanical Q Factor (Qms): 6.54

Electrical Q Factor (Qes): 0.43

Total Q Factor (Qts): 0.40

Xmax: 27mm

Magnet Weight: 400Oz

Net Weight: 34kg

Basket: Aluminum Stamping

Magnet: Ferrite Magnet

Magnet Dimensions: Φ250*20mm x 3PCS

• Outer Dimensions: 467mm - 18.4"
• Mounting Depth: 310mm - 12.2"
• Magnet Dimension: 260mm - 10.02"
• Mounting Hole Dimension: 428mm - 16.9"