The Eminence Beta 10A is an ideal relacement speaker for your vocal PA, keyboards, club music systems, and for stage monitors. Eminence recommends the Beta 10A as a replacement speaker for the Mackie SRM350 and as an alternate to the Alpha 10A as a replacement for the Kustom KPC10M. Eminence Beta 10A PA Replacement Speaker Specifications: * Specification * Nominal Basket Diameter: 10", 254mm * Nominal Impedance*: 8 ohms * Power Rating: Watts 250W; Music Program 500W * Resonance: 53Hz * Usable Frequency Range: 51Hz-3.8kHz * Sensitivity***: 97 * Magnet Weight: 34 oz. * Gap Height: 0.312", 7.92mm * Voice Coil Diameter: 2", 50.8mm * * Thiele & small parameters * Resonant Frequency (fs) * 53HzDC Resistance (Re): 5.75 * Coil Inductance (Le); 0.67mH * Mechanical Q (Qms): 8.14 * Electromagnetic Q (Qes): 0.52 * Total Q (Qts): 0.49 * Compliance Equivalent Volume (Vas): 60.1 liters / 2.1 cu. ft. * Peak Diaphragm Displacement Volume (Vd): 102cc * Mechanical Compliance of Suspension (Cms): 0.36mm/N * BL Product (BL): 9.6 T-M * Diaphram Mass inc. Airload (Mms): 25 grams * Efficiency Bandwidth Product (EBP): 103 * Maximum Linear Excursion (Xmax): 3.0mm * Surface Area of Cone (Sd): 344.9 cm2 * Maximum Mechanical Limit (Xlim): 8.6mm Mounting information * Recommended Enclosure: Sealed * 8.5-14.2 liters/0.3-0.5 cu.ft. * Vented: 19.8-70.8 liters/0.7-2.5 cu.ft. * Overall Diameter: 10.11", 256.8mm * Baffle Hole Diameter: 9.13", 231.8mm * Front Sealing Gasket: fitted as standard * Rear Sealing Gasket * fitted as standard * Mounting Holes Diameter: 0.23", 5.7mm * Mounting Holes B.C. D.: 9.6", 243.8mm * Depth: 3.98", 101mm * Net Weight: 6.8 lbs., 3.1 kg * Shipping Weight: 7.8 lbs., 3.6 kg * * Materials of construction * Coil Construction: Aluminum voice coil * Coil Former: Polyimide former * Magnet Composition: Ferrite magnet * Core Details: Vented core * Basket Materials: Pressed steel basket * Cone Composition: Paper Cone * Cone Edge Composition: Cloth cone edge * Dustcap Composition: Solid composition paper dust cap Eminence