Ideally suited for line arrays, car doors, side panels, and other tight-fitting applications, the Alpha 4 is a versatile 110-watt driver that can be used full range, midbass, or as a midrange. They can be stacked in a column for vocal applications or with a tweeter and a sub for compact, high-performance PA or MI applications.
Applications
Midbass | Midrange | Full Range Line Array | Pro Audio | Car Audio | Bookshelf Speakers | Satellite System
Box Type: Sealed | Vented
Specifications
Download Spec Sheet Download Cab Design| SPECIFICATION | |
| Nominal Basket Diameter | 4", 102 mm |
| Nominal Impedance* | 4 Ω |
| Power Rating* | |
| Program Power | 110 W |
| Watts | 55 W |
| Resonance | 120 Hz |
| Usable Frequency Range | 105 Hz - 10 kHz |
| Sensitivity* | 88 dB |
| Magnet Weight | 10 oz. |
| Gap Height | 0.144", 3.7 mm |
| Voice Coil Diameter | 1", 25 mm |
| THIELE & SMALL PARAMETERS | |
| Resonant Frequency (fs) | 120 Hz |
| DC Resistance (Re) | 3.42 Ω |
| Coil Inductance (Le) | 0.18m H |
| Mechanical Q (Qms) | 6.41 |
| Electromagnetic Q (Qes) | 0.7 |
| Total Q (Qts) | 0.63 |
| Compliance Equivalent Volume (Vas) | 1.76 liters / 0.06 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) | 15 cc |
| Mechanical Compliance of Suspension (Cms) | 0.38 mm/N |
| BL Product (BL) | 4.12 T-M |
| Diaphragm Mass Inc. Airload (MMs) | 5 grams |
| Efficiency Bandwidth Product (EBP) | 172 |
| 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 | 1.84-4.53 liters / 0.07-0.16 cu.ft. |
| Vented | 3.96-7.08 liters / 0.14-0.25 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 | 3.3 lbs, 1.5 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 |
Frequency Response
