4x Eminence DELTA PRO-8A 8" 450W Pro Audio Mid-Range Speaker 8-Ohm Midbass Woofer

Specification

Nominal Basket Diameter

• 8", 203 mm

Nominal Impedance*

• 8 Ohm

Power Rating

Program Power

• 450 W

Watts

• 225 W

Resonance

• 69 Hz

Usable Frequency Range

• 100 Hz - 3 kHz

Sensitivity*

• 97.8 dB

Magnet Weight

• 59 oz.

Gap Height

• 0.31", 7.9 mm

Voice Coil Diameter

• 2", 51 mm

Thiele & Small Parameters

Resonant Frequency (fs)

• 69 Hz

DC Resistance (Re)

• 5.4 Ohm

Coil Inductance (Le)

• 0.82m H

Mechanical Q (Qms)

• 6.43

Electromagnetic Q (Qes)

• 0.22

Total Q (Qts)

• 0.22

Compliance Equivalent Volume (Vas)

• 18.32 liters / 0.65 cu.ft.

Peak Diaphragm Displacement Volume (Vd)

• 66 cc

Mechanical Compliance of Suspension (Cms)

• 0.28 mm/N

BL Product (BL)

• 14.1 T-M

Diaphragm Mass Inc. Airload (MMs)

• 19 grams

Efficiency Bandwidth Product (EBP)

• 307

Maximum Linear Excursion (Xmax)

• 3 mm

Surface Area of Cone (Sd)

• 218.2 cm2

Maximum Mechanical Limit (Xlim)

• 7 mm

Mounting Information

Recommended Enclosure Volume

Sealed

• 8-16 liters / 0.3-0.6 cu.ft.

Vented

• 10-16 liters / 0.4-0.6 cu.ft.

Driver Volume Displaced

• 0.037 cu.ft. / 1.04 liters

Major Diameter

• 9.36", 237.7 mm

Flat to Flat Diameter

• 8.02", 203.7 mm

Baffle Hole Diameter

• 7.36", 186.9 mm

Front Sealing Gasket

• Yes

Rear Sealing Gasket

• Yes

Mounting Holes Diameter

• 0.28", 7.1mm

Mounting Holes B.C.D.

• 8.6", 218.4mm

Depth

• 3.75", 95.3 mm

Net Weight

• 10 lbs, 4.54 kg

Shipping Weight

• 11 lbs, 4.99 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