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Eminence Alpha 15A, 8 ohm. Good pick for guitar amps like the Ampeg Gemini II G15, Gemini VI GS15R and Ampeg GV15.
| Specification |
| Nominal Basket Diameter |
15", 381 mm |
| Nominal Impedance* |
8 Ω |
| Power Rating* |
| Program Power |
400 W |
| Watts |
200 W |
| Resonance |
41 Hz |
| Usable Frequency Range |
46 Hz - 3.5 kHz |
| Sensitivity* |
97 dB |
| Magnet Weight |
25 oz. |
| Gap Height |
0.25", 6.4 mm |
| Voice Coil Diameter |
1.5", 38 mm |
| Thiele & Small Parameters |
| Resonant Frequency (fs) |
41 Hz |
| DC Resistance (Re) |
5.88 Ω |
| Coil Inductance (Le) |
0.84m H |
| Mechanical Q (Qms) |
7.23 |
| Electromagnetic Q (Qes) |
1.53 |
| Total Q (Qts) |
1.26 |
| Compliance Equivalent Volume (Vas) |
260 liters / 9.18 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) |
325 cc |
| Mechanical Compliance of Suspension (Cms) |
0.25 mm/N |
| BL Product (BL) |
7.7 T-M |
| Diaphragm Mass Inc. Airload (MMs) |
59 grams |
| Efficiency Bandwidth Product (EBP) |
27 |
| Maximum Linear Excursion (Xmax) |
3.8 mm |
| Surface Area of Cone (Sd) |
856.3 cm2 |
| Maximum Mechanical Limit (Xlim) |
8.4 mm |
| Mounting Information |
| Recommended Enclosure Volume |
| Sealed |
71-85 liters / 2.5-3 cu.ft. |
| Vented |
106-177 liters / 3.75-6.25 cu.ft. |
| Driver Volume Displaced |
0.113 cu.ft. / 3.21 liters |
| Overall Diameter |
15.15", 384.8 mm |
| Baffle Hole Diameter |
13.87", 352.3 mm |
| Front Sealing Gasket |
Yes |
| Rear Sealing Gasket |
Yes |
| Mounting Holes Diameter |
0.25", 6.4mm |
| Mounting Holes B.C.D. |
14.56", 369.8mm |
| Depth |
5.83", 148.1 mm |
| Net Weight |
6.7 lbs, 3.04 kg |
| Shipping Weight |
8.8 lbs, 3.99 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 |
Pressed steel basket |
| Cone Composition |
Paper cone |
| Cone Edge Composition |
Cloth cone edge |
| Dust Cap Composition |
Solid composition paper dust cap |
$ 77.00
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