Eminence SIGMA PRO 18A-2 18" Professional Pro Audio Replacement Woofer 1300W

SPECIFICATION

Nominal Basket Diameter

• 18", 457 mm

Nominal Impedance*

• 8 Ω

Power Rating*

Program Power

• 1300 W

Watts

• 650 W

Resonance

• 28 Hz

Usable Frequency Range

• 41 Hz - 2.4 kHz

Sensitivity*

• 99 dB

Magnet Weight

• 120 oz.

Gap Height

• 0.375", 9.5 mm

Voice Coil Diameter

• 3", 76 mm

THIELE & SMALL PARAMETERS

Resonant Frequency (fs)

• 28 Hz

DC Resistance (Re)

• 6.29 Ω

Coil Inductance (Le)

• 1.9m H

Mechanical Q (Qms)

• 8.28

Electromagnetic Q (Qes)

• 0.3

Total Q (Qts)

• 0.29

Compliance Equivalent Volume (Vas)

• 441.2 liters / 15.58 cu.ft.

Peak Diaphragm Displacement Volume (Vd)

• 695 cc

Mechanical Compliance of Suspension (Cms)

• 0.24 mm/N

BL Product (BL)

• 22.1 T-M

Diaphragm Mass Inc. Airload (MMs)

• 130 grams

Efficiency Bandwidth Product (EBP)

• 93

Maximum Linear Excursion (Xmax)

• 6.1 mm

Surface Area of Cone (Sd)

• 1140 cm2

Maximum Mechanical Limit (Xlim)

• 18 mm

MOUNTING INFORMATION

Recommended Enclosure Volume

Sealed

• N/a

Vented

• 93-212 liters / 3.3-7.5 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

• 8.15", 207 mm

Net Weight

• 24.5 lbs, 11.11 kg

Shipping Weight

• 28.1 lbs, 12.75 kgs

MATERIALS OF CONSTRUCTION

Coil Construction

• Copper voice coil

Coil Former

• Polyimide former

Magnet Composition

• Ferrite magnet

Core Details

• Vented and extended core

Basket Materials

• Die-cast aluminum basket

Cone Composition

• Paper cone

Cone Edge Composition

• Cloth cone edge

Dust Cap Composition

• Solid composition paper dust cap