This table charts the specifications for the ALPHA6ABMR speaker * Nominal Basket Diameter: 6-in 165 mm. * Nominal Impedance: 8 Ohms. * Power Rating: * Watts: 100 W. * Music Program: 200 W. * Resonance: 407 Hz. * Usable Frequency Range: 400 Hz - 5 kHz. * Sensitivity: 97.8 dB. * Magnet Weight: 16 oz.. * Gap Height: 0.25-in 6.4 mm. * Voice Coil Diameter: 1.5-in 38 mm. * Thiele & Small Parameters. * Resonant Frequency (fs): 407 Hz. * DC Resistance (Re): 5.26 Ohms. * Coil Inductance (Le): 0.38m H. * Mechanical Q (Qms): 6.04. * Electromagnetic Q (Qes): 1.74. * Total Q (Qts): 1.35. * Compliance Equivalent Volume (Vas): 0.45 liters / 0.02 cu.ft.. * Peak Diaphragm Displacement Volume (Vd): 19 cc. * Mechanical Compliance of Suspension (Cms): 0.02 mm/N. * BL Product (BL): 7.86 T-M. * Diaphragm Mass Inc. Airload (MMs): 8 grams. * Efficiency Bandwidth Product (EBP): 234. * Maximum Linear Excursion (Xmax): 1.5 mm. * Surface Area of Cone (Sd): 126.7 cm2. * Maximum Mechanical Limit (Xlim): 3 mm. ----------------------------------- Recommended Enclosure Volume; * Sealed: N/a. * Vented: - liters / - cu.ft.. * Driver Volume Displaced: 0.014 cu.ft. / 0.4 liters. * Overall Diameter: 6.59-in 167.4 mm. * Baffle Hole Diameter: 5.69-in 144.5 mm. * Front Sealing Gasket: Yes. * Rear Sealing Gasket: Yes. * Mounting Holes Diameter: 0.23-in 5.8mm. * Mounting Holes B.C.D.: 6.06-in 153.9mm. * Depth: 2.2-in 55.9 mm. * Net Weight: 3.7 lbs 1.68 kg. * Shipping Weight: 4.4 lbs 2 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.