ALPHA 4: 4.5″ Midrange / Midbass / Full Range
Available in 4 or 8 ohms
SOLD IN PAIRS!
Perfectly suited for line arrays, car doors and side panels, and other tight fitting applications, the Alpha 4 is a very versatile 110 watt driver that can be used full range, as a midbass, or as a midrange. They can be stacked by themselves in a column for vocal applications, or in conjunction with a tweeter and a sub for compact, high performance PA or MI applications.
Click Here to Download 4 ohm PDF Spec Sheet
Click Here to Download 4 ohm PDF Cabinet Design
Click Here to Download 8 ohm PDF Spec Sheet
Click Here to Download 8 ohm PDF Cabinet Design
| 8 ohm Specification | |
| Nominal Basket Diameter | 4″, 102 mm |
| Nominal Impedance* | 8 Ω |
| Power Rating* | |
| Program Power | 110 W |
| Watts | 55 W |
| Resonance | 123 Hz |
| Usable Frequency Range | 105 Hz – 12 kHz |
| Sensitivity* | 88 dB |
| Magnet Weight | 10 oz. |
| Gap Height | 0.14″, 3.7 mm |
| Voice Coil Diameter | 1″, 25 mm |
| Thiele & Small Parameters | |
| Resonant Frequency (fs) | 123 Hz |
| DC Resistance (Re) | 6.73 Ω |
| Coil Inductance (Le) | 0.28m H |
| Mechanical Q (Qms) | 6.83 |
| Electromagnetic Q (Qes) | 0.84 |
| Total Q (Qts) | 0.75 |
| Compliance Equivalent Volume (Vas) | 1.94 liters / 0.07 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) | 15 cc |
| Mechanical Compliance of Suspension (Cms) | 0.42 mm/N |
| BL Product (BL) | 4.94 T-M |
| Diaphragm Mass Inc. Airload (MMs) | 4 grams |
| Efficiency Bandwidth Product (EBP) | 146 |
| Maximum Linear Excursion (Xmax) | 2.6 mm |
| Surface Area of Cone (Sd) | 57.7 cm2 |
| Maximum Mechanical Limit (Xlim) | 4.5 mm |
| Mounting Information | |
| Recommended Enclosure Volume | |
| Sealed | 1.87-8.5 liters / 0.07-0.3 cu.ft. |
| Vented | 2.27-4.25 liters / 0.08-0.15 cu.ft. |
| Driver Volume Displaced | 0.012 cu.ft. / 0.33 liters |
| Overall Diameter | 4.57″, 116.1 mm |
| Baffle Hole Diameter | 3.77″, 95.8 mm |
| Front Sealing Gasket | Yes |
| Rear Sealing Gasket | Yes |
| Mounting Holes Diameter | 0.15″, 3.8mm |
| Mounting Holes B.C.D. | 4.25″, 108mm |
| Depth | 2.31″, 58.7 mm |
| Net Weight | 1.5 lbs, 0.68 kg |
| Shipping Weight | 1.9 lbs, 0.86 kgs |
Materials of Construction | |
| Coil Construction | Copper voice coil |
| Coil Former | Polyimide former |
| Magnet Composition | Ferrite magnet |
| Core Details | Non-Vented core |
| Basket Materials | Pressed steel basket |
| Cone Composition | Paper cone |
| Cone Edge Composition | Cloth cone edge |
| Dust Cap Composition | Solid composition paper dust cap |
