Model: TRF SW1845 D0.5

Size: 18 inches

Cone: Paper competition level

Surround material: Fabric molded

Voice coil: MADE IN THE USA

Voice coil dimensions: 4.0 inches

Voice coil depth: 8 layers

Dust cap: Carbon made in Europe

Nominal impedance: Dual 0.5Ω

Voice coil wire: Aluminum

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

Spider material: NOMEX

Spider layers: 2 pieces x 4 layers

RMS Power handling: 4500wrms

Max Power handling: 9000wmax

Sensitivity: 90.2dB

Resonant frequency (f0): 32.2Hz

Mechanical Q factor (Qms): 6.54Hz

Electrical Q factor (Qes): 0.43

Total Q factor (Qts): 0.40

Xmax: 27mm

Power factor: N/A

Magnet weight: 400Oz

Net weight: 34kg

Basket: Aluminum cast iron

Magnet: Ferrite magnet

Magnet dimension: Φ250*20mm x 3PCS

• External dimension: 467mm - 18.4"
• Mounting depth: 310mm - 12.2"
• Magnet dimension: 260mm - 10.2"
• Mounting hole dimension: 428mm - 16.9"