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Options:
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| DELTA PRO-12A |
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| SPECIFICATION |
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| Nominal Basket Diameter |
12", 304.8mm |
| Nominal Impedance* |
8 ohms |
| Power Rating |
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 Watts |
400W |
| Music Program |
800W |
| Resonance |
51Hz |
| Usable Frequency Range |
52Hz-4.5kHz |
| Sensitivity*** |
99.2 |
| Magnet Weight |
80 oz. |
| Gap Height |
0.375", 9.53mm |
| Voice Coil Diameter |
2.5", 63.5mm |
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| THIELE & SMALL PARAMETERS |
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| Resonant Frequency (fs) |
51Hz |
| DC Resistance (Re) |
5.71 |
| Coil Inductance (Le) |
0.84mH |
| Mechanical Q (Qms) |
7.56 |
| Electromagnetic Q (Qes) |
0.37 |
| Total Q (Qts) |
0.35 |
| Compliance Equivalent Volume (Vas) |
81.7 liters / 2.9 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) |
242cc |
| Mechanical Compliance of Suspension (Cms) |
0.21mm/N |
| BL Product (BL) |
15.3 T-M |
| Diaphram Mass inc. Airload (Mms) |
48 grams |
| Efficiency Bandwidth Product (EBP) |
138 |
| Maximum Linear Excursion (Xmax) |
4.6mm |
| Surface Area of Cone (Sd) |
532.4 cm2 |
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| Maximum Mechanical Limit (Xlim) |
13.7mm |
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| MOUNTING INFORMATION |
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| Recommended Enclosure |
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| Sealed |
28-35 liters/1-1.25 cu.ft. |
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| Vented |
31-91 liters/1.1-3.2 cu.ft. |
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| Overall Diameter |
12.38", 314.5mm |
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| Baffle Hole Diameter |
11.07", 281mm |
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| Front Sealing Gasket |
fitted as standard |
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| Rear Sealing Gasket |
fitted as standard |
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| Mounting Holes Diameter |
0.27", 6.9mm |
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| Mounting Holes B.C. D. |
11.57", 293.8mm |
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| Depth |
6.22", 158mm |
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| Net Weight |
16.3 lbs., 7.4 kg |
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| Shipping Weight |
18 lbs., 8.2 kg |
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| MATERIALS OF CONSTRUCTION |
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| Coil Construction |
Aluminum voice coil |
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| Coil Former |
Polyimide former |
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| Magnet Composition |
Ferrite magnet |
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| Core Details |
Vented and extended core |
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| Basket Materials |
Die-cast aluminum basket |
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| Cone Composition |
Paper Cone |
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| Cone Edge Composition |
Cloth cone edge |
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| Dustcap Composition |
Solid composition paper dust cap |
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