SPECIFICATION |
Nominal Basket Diameter |
18", 457 mm |
Nominal Impedance* |
8 Ω |
Power Rating** |
Watts |
800 W |
Music Program |
1600 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) |
5.2 Ω |
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) |
16.0 mm |
MOUNTING INFORMATION |
Recommended Enclosure Volume |
Sealed |
N/a |
Vented |
96.00-198.00 liters / 3.40-7.00 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 |
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Basket Materials |
Die-cast aluminum basket |
Cone Composition |
Paper cone |
Cone Edge Composition |
Cloth cone edge |
Dust Cap Composition |
Solid composition paper dust cap |