| SPECIFICATION |
| Nominal Basket Diameter |
18", 457 mm |
| Nominal Impedance* |
8 Ω |
| Power Rating** |
| Watts |
500 W |
| Music Program |
1000 W |
| Resonance |
28 Hz |
| Usable Frequency Range |
37 Hz - 0.2 kHz |
| Sensitivity*** |
96 dB |
| Magnet Weight |
67 oz. |
| Gap Height |
0.38", 9.7 mm |
| Voice Coil Diameter |
2.5", 64 mm |
| THIELE & SMALL PARAMETERS |
| Resonant Frequency (fs) |
28 Hz |
| DC Resistance (Re) |
5.3 Ω |
| Coil Inductance (Le) |
3.43m H |
| Mechanical Q (Qms) |
10.38 |
| Electromagnetic Q (Qes) |
0.33 |
| Total Q (Qts) |
0.32 |
| Compliance Equivalent Volume (Vas) |
493.2 liters / 17.42 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) |
796 cc |
| Mechanical Compliance of Suspension (Cms) |
0.25 mm/N |
| BL Product (BL) |
18.9 T-M |
| Diaphragm Mass Inc. Airload (MMs) |
128 grams |
| Efficiency Bandwidth Product (EBP) |
84 |
| Maximum Linear Excursion (Xmax) |
6.7 mm |
| Surface Area of Cone (Sd) |
1188 cm2 |
| Maximum Mechanical Limit (Xlim) |
15. mm |
| MOUNTING INFORMATION |
| Recommended Enclosure Volume |
| Sealed |
N/a |
| Vented |
85-297 liters / 3-10.5 cu.ft. |
| Driver Volume Displaced |
0.212 cu.ft. / 6.01 liters |
| Overall Diameter |
18", 457.2 mm |
| Baffle Hole Diameter |
16.57", 420.9 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 |
8.13", 206.5 mm |
| Net Weight |
17 lbs, 7.71 kg |
| Shipping Weight |
20.5 lbs, 9.3 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 |
