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.
SPECIFICATION | |
Nominal Basket Diameter | 4", 102 mm |
Nominal Impedance* | 4 or 8 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 or 6.73 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 |