The Eminence Private Jack guitar speaker is chock full of Classic British flavor. A very well balanced speaker, thick and smooth, with lots of midst and extended highs. || This table charts the specifications for the PRIVATE JACKT 16 speaker * Nominal Basket Diameter: 12-in , 305 mm. * Nominal Impedance: 16 Ohms. * Power Rating: * Watts: 50 W. * Music Program: N/A. * Resonance: 101 Hz. * Usable Frequency Range: 80 Hz - 6 kHz. * Sensitivity: 100.3 dB. * Magnet Weight: 38 oz.. * Gap Height: 0.312-in , 7.9 mm. * Voice Coil Diameter: 1.75-in , 44 mm. * Thiele & Small Parameters. * Resonant Frequency (fs): 101 Hz. * DC Resistance (Re): 14 Ohms. * Coil Inductance (Le): 0.77m H. * Mechanical Q (Qms): 12.69. * Electromagnetic Q (Qes): 1.11. * Total Q (Qts): 1.02. * Compliance Equivalent Volume (Vas): 35.9 liters / 1.27 cu.ft.. * Peak Diaphragm Displacement Volume (Vd): 64.4 cc. * Mechanical Compliance of Suspension (Cms): 0.09 mm/N. * BL Product (BL): 14.6 T-M. * Diaphragm Mass Inc. Airload (MMs): 27 grams. * Efficiency Bandwidth Product (EBP): 91. * Maximum Linear Excursion (Xmax): 1.24 mm. * Surface Area of Cone (Sd): 519.5 cm2. * Maximum Mechanical Limit (Xlim): N/A. Recommended Enclosure Volume; * Sealed: Acceptable. * Vented: Acceptable. * Driver Volume Displaced: 0.071 cu.ft. / 2 liters. * Overall Diameter: 12.03-in , 305.6 mm. * Baffle Hole Diameter: 11.07-in , 281.2 mm. * Front Sealing Gasket: Yes. * Rear Sealing Gasket: Yes. * Mounting Holes Diameter: 0.25-in , 6.4mm. * Mounting Holes B.C.D.: 11.59-in , 294.4mm. * Depth: 5.1-in , 129.5 mm. * Net Weight: 8 lbs, 3.63 kg. * Shipping Weight: 9.8 lbs, 4.45 kgs. * Materials of Construction. * Coil Construction: Copper voice coil. * Coil Former: Paper former. * Magnet Composition: Ferrite magnet. * Core Details: Non-vented core. * Basket Materials: Pressed steel basket. * Cone Composition: Paper cone. * Cone Edge Composition: Paper cone edge. * Dust Cap Composition: Zurette dust cap.