Description
Ideal for tight fitting column and line array applications, the Alpha 2 features a 0.64" copper voice coil and 2.7 oz. ferrite magnet. With under spider venting and a flux source cap, this 8 ohm driver lets the heat out while containing the magnetic flux, which is critical for multi-unit designs packed tightly together. Rated at 30 watts program power, the Alpha 2 has a wide usable frequency range of 200 Hz – 20 kHz.
Manufacturer Spec Sheet
Example Cabinet Designs
Specifications |
|
| Nominal Basket Diameter | 2", 51 mm |
| Nominal Impedance* | 8 Ω |
Power Rating* |
|
| Program Power | 30 W |
| Watts | 20 W |
| Resonance | 186 Hz |
| Usable Frequency Range | 200 Hz - 20 kHz |
| Sensitivity* | 83.8 dB |
| Magnet Weight | 3 oz. |
| Gap Height | 0.12", 3.1 mm |
| Voice Coil Diameter | 0.64", 16 mm |
T/S Parameters |
|
| Resonant Frequency (fs) | 186 Hz |
| DC Resistance (Re) | 6.4 Ω |
| Coil Inductance (Le) | 0.13m H |
| Mechanical Q (Qms) | 3.06 |
| Electromagnetic Q (Qes) | 0.94 |
| Total Q (Qts) | 0.72 |
| Compliance Equivalent Volume (Vas) | 0.18 liters / 0.01 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) | 2.1 cc |
| Mechanical Compliance of Suspension (Cms) | 0.84 mm/N |
| BL Product (BL) | 2.64 T-M |
| Diaphragm Mass Inc. Airload (MMs) | 1 grams |
| Efficiency Bandwidth Product (EBP) | 198 |
| Maximum Linear Excursion (Xmax) | 1.7 mm |
| Surface Area of Cone (Sd) | 12.37 cm2 |
| Maximum Mechanical Limit (Xlim) | 2.2 mm |
Mounting |
|
Recommended Enclosure Volume |
|
| Sealed | 0.42-0.54 liters / .015-.019 cu.ft. |
| Vented | 0.37-0.57 liters / .013-.02 cu.ft. |
| Driver Volume Displaced | 0.001 cu.ft. / 0.03 liters |
| Overall Diameter | 2.75", 69.9 mm |
| Baffle Hole Diameter | 2", 50.8 mm |
| Front Sealing Gasket | Yes |
| Rear Sealing Gasket | N/A |
| Mounting Holes Diameter | 0.15", 3.8mm |
| Mounting Holes B.C.D. | 2.36", 50.8mm |
| Depth | 1.63", 41.4 mm |
| Net Weight | 0.4 lbs, 0.18 kg |
| Shipping Weight | 2 lbs, 0.91 kgs |
Construction |
|
| Coil Construction | Copper |
| Coil Former | Polyimide |
| Magnet Composition | Ferrite |
| Core Details | Solid with flux source cap |
| Basket Materials | Pressed Steel |
| Cone Composition | Paper/Poly Sandwich |
| Cone Edge Composition | Cloth |
| Dust Cap Composition | Poly |