0.84

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. Midbass | Midrange Line Array | Pro Audio | Car Audio | Bookshelf Speakers | Satellite System Box Type: Sealed | Vented SPECIFICATIONNominal Basket Diameter4", 102 mmNominal Impedance*8 ΩPower Rating*Program Power110 WWatts55 WResonance123 HzUsable Frequency Range105 Hz - 12 kHzSensitivity*88 dBMagnet Weight10 oz.Gap Height0.144", 3.7 mmVoice Coil Diameter1", 25 mmTHIELE & SMALL PARAMETERSResonant Frequency (fs)123 HzDC Resistance (Re)6.73 ΩCoil Inductance (Le)0.28m HMechanical Q (Qms)6.83Electromagnetic Q (Qes)0.84Total Q (Qts)0.75Compliance Equivalent Volume (Vas)1.94 liters / 0.07 cu.ft.Peak Diaphragm Displacement Volume (Vd)15 ccMechanical Compliance of Suspension (Cms)0.42 mm/NBL Product (BL)4.94 T-MDiaphragm Mass Inc. Airload (MMs)4 gramsEfficiency Bandwidth Product (EBP)146Maximum Linear Excursion (Xmax)2.6 mmSurface Area of Cone (Sd)57.7 cm2Maximum Mechanical Limit (Xlim)4.5 mmMOUNTING INFORMATIONRecommended Enclosure VolumeSealed1.87-8.5 liters / 0.07-0.3 cu.ft.Vented2.27-4.25 liters / 0.08-0.15 cu.ft.Driver Volume Displaced0.012 cu.ft. / 0.33 litersOverall Diameter4.57", 116.1 mmBaffle Hole Diameter3.77", 95.8 mmFront Sealing GasketYesRear Sealing GasketYesMounting Holes Diameter0.15", 3.8mmMounting Holes B.C.D.4.25", 108mmDepth2.31", 58.7 mmNet Weight1.5 lbs, 0.68 kgShipping Weight3.3 lbs, 1.5 kgsMATERIALS OF CONSTRUCTIONCoil ConstructionCopper voice coilCoil FormerPolyimide formerMagnet CompositionFerrite magnetCore DetailsNon-Vented core Basket MaterialsPressed steel basketCone CompositionPaper coneCone Edge CompositionCloth cone edgeDust Cap CompositionSolid composition paper dust cap