Eminence Alpha 12A 12" 8 Ohm 150W Professional Midbass Woofer Speaker for Studio Monitors, PA Systems & Live Sound Applications
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Description
Recommended for professional audio mid bass applications in a small sealed or medium vented enclosure.
| Specification | |
| Nominal Basket Diameter | 12", 305 mm |
| Nominal Impedance* | 8 Ω |
| Power Rating* | |
| Program Power | 300 W |
| Watts | 150 W |
| Resonance | 49 Hz |
| Usable Frequency Range | 51 Hz - 4.3 kHz |
| Sensitivity* | 95.6 dB |
| Magnet Weight | 20 oz. |
| Gap Height | 0.25", 6.4 mm |
| Voice Coil Diameter | 1.5", 38 mm |
| Thiele & Small Parameters | |
| Resonant Frequency (fs) | 49 Hz |
| DC Resistance (Re) | 6.3 Ω |
| Coil Inductance (Le) | 0.79m H |
| Mechanical Q (Qms) | 6.53 |
| Electromagnetic Q (Qes) | 0.88 |
| Total Q (Qts) | 0.77 |
| Compliance Equivalent Volume (Vas) | 121.5 liters / 4.29 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) | 125 cc |
| Mechanical Compliance of Suspension (Cms) | 0.32 mm/N |
| BL Product (BL) | 8.5 T-M |
| Diaphragm Mass Inc. Airload (MMs) | 33 grams |
| Efficiency Bandwidth Product (EBP) | 56 |
| Maximum Linear Excursion (Xmax) | 2.4 mm |
| Surface Area of Cone (Sd) | 519.5 cm2 |
| Maximum Mechanical Limit (Xlim) | 6.6 mm |
| Mounting Information | |
| Recommended Enclosure Volume | |
| Sealed | 17-22.7 liters / 0.6-0.8 cu.ft. |
| Vented | 56.6-113.3 liters / 2-4 cu.ft. |
| Driver Volume Displaced | 0.063 cu.ft. / 1.78 liters |
| Overall Diameter | 12.26", 311.4 mm |
| Baffle Hole Diameter | 11.06", 280.9 mm |
| Front Sealing Gasket | Yes |
| Rear Sealing Gasket | Yes |
| Mounting Holes Diameter | 0.25", 6.4mm |
| Mounting Holes B.C.D. | 11.71", 297.4mm |
| Depth | 4.73", 120.1 mm |
| Net Weight | 5.3 lbs, 2.4 kg |
| Shipping Weight | 7.4 lbs, 3.36 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 | Pressed steel basket |
| Cone Composition | Paper cone |
| Cone Edge Composition | Cloth cone edge |
| Dust Cap Composition | Solid composition felt dust cap |
