GMK-18125-008

Subwoofer Thiele/Small (T/S) Specifications

Driver Model:GMK-18125-008

General Specifications:

• Nominal Diameter: 18 inches (457 mm)

• Impedance: Dual 1 ohm

• RMS Power Handling: 5000 watts

• Peak Power Handling: 10000 watts

• Voice Coil Diameter: 3x Flat Wound 125mm/5”

Thiele/Small Parameters:

• Re (DC Resistance): 2 ohms

• Fs (Resonant Frequency): 27.63 Hz

• Qms (Mechanical Q): 2.83

• Qes (Electrical Q): 0.48

• Qts (Total Q): 0.41

• Vas (Equivalent Volume): 134.62 liters (4.75 cu ft)

• Cms (Compliance of Suspension): 0.06 mm/N

• Mms (Mechanical Mass of Driver): 516.65 grams

• Sd (Effective Surface Area): 0.12 sq m (1,200 sq cm)

• Bl (Magnetic Force Factor): 19.31 Tm

• SPL (Sensitivity): 98 dB/W/m

• η₀ (Efficiency, η₀): 0.56 %

Physical Specifications:

• Mounting Depth: 283 mm (11.1 inches)

• Cutout Diameter: 430 mm (16.9 inches)

• Overall Diameter: 465 mm (18.3 inches)

• Weight: (68.8 lbs)

Additional Features:

• Cone Material: Carbon Fiber

• Surround Material: BeFoam

• Basket Material: Aluminum

• Magnet Type: Ferrite

• Cooling System: Vented Pole

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