Recommended for professional audio as a woofer in vented enclosures. Also ideal for horn loading and scoops.

SPECIFICATION

Nominal Basket Diameter

18", 457 mm

Nominal Impedance*

8 Ohm

Power Rating*

Program Power

1600 W

Watts

800 W

Resonance

25 Hz

Usable Frequency Range

40 Hz - 0.8 kHz

Sensitivity*

97 dB

Magnet Weight

109 oz.

Gap Height

0.375", 9.5 mm

Voice Coil Diameter

4", 102 mm

THIELE & SMALL PARAMETERS

Resonant Frequency (fs)

25 Hz

DC Resistance (Re)

2.5 or 5.2 Ohm

Coil Inductance (Le)

1.67m H

Mechanical Q (Qms)

8.18

Electromagnetic Q (Qes)

0.32

Total Q (Qts)

0.31

Compliance Equivalent Volume (Vas)

548.7 liters / 19.38 cu.ft.

Peak Diaphragm Displacement Volume (Vd)

556 cc

Mechanical Compliance of Suspension (Cms)

0.29 mm/N

BL Product (BL)

18.8 T-M

Diaphragm Mass Inc. Airload (MMs)

137 grams

Efficiency Bandwidth Product (EBP)

79

Maximum Linear Excursion (Xmax)

4.8 mm

Surface Area of Cone (Sd)

1159 cm2

Maximum Mechanical Limit (Xlim)

16 mm

MOUNTING INFORMATION

Recommended Enclosure Volume

Sealed

N/a

Vented

96-198 liters / 3.4-7 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

25.2 lbs, 11.43 kg

Shipping Weight

28.9 lbs, 13.11 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...