High sensitivity midrange driver
for pro audio or MI. Truncated cast
aluminum heat sink style basket is
great for stacking in a line array.
SPECIFICATION :
Nominal Basket Diameter 8" , 203 mm
Nominal Impedance* 8 ©
Power Rating* *
Watts 225 W
Music Program 450 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
EMINENCE DELTA PRO 8A
THIELE & SMALL PARAMETERS :
Resonant Frequency ( fs) 69 Hz
DC Resistance ( Re) 5.4 ©
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
Overall 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