Eminence PATRIOT820H 8 Replacement Guitar Speaker Fe

This item is brand-new, factory sealed.

This table charts the specifications for the 820H speaker
* Nominal Basket Diameter: 8-in , 203 mm.
* Nominal Impedance: 4 Ohms.
* Power Rating:
* Watts: 20 W.
* Music Program: 40 W.
* Resonance: 144 Hz.
* Usable Frequency Range: 80 Hz - 4.6 kHz.
* Sensitivity: 96.1 dB.
* Magnet Weight: 15 oz..
* Gap Height: 0.25-in , 6.4 mm.
* Voice Coil Diameter: 1-in , 25 mm.
* Thiele & Small Parameters.
* Resonant Frequency (fs): 144 Hz.
* DC Resistance (Re): 3.64 Ohms.
* Coil Inductance (Le): 0.33m H.
* Mechanical Q (Qms): 18.78.
* Electromagnetic Q (Qes): 0.92.
* Total Q (Qts): 0.88.
* Compliance Equivalent Volume (Vas): 9.62 liters / 0.34 cu.ft..
* Peak Diaphragm Displacement Volume (Vd): 36.7 cc.
* Mechanical Compliance of Suspension (Cms): 0.13 mm/N.
* BL Product (BL): 5.74 T-M.
* Diaphragm Mass Inc. Airload (MMs): 9 grams.
* Efficiency Bandwidth Product (EBP): 156.
* Maximum Linear Excursion (Xmax): 1.59 mm.
* Surface Area of Cone (Sd): 230.9 cm2.
* Maximum Mechanical Limit (Xlim): N/A.
-----------------------------------
Recommended Enclosure Volume;
* Sealed: Acceptable.
* Vented: Acceptable.
* Driver Volume Displaced: 0.018 cu.ft. / 0.51 liters.
* Overall Diameter: 8.24-in , 209.3 mm.
* Baffle Hole Diameter: 7.13-in , 181.1 mm.
* Front Sealing Gasket: Yes.
* Rear Sealing Gasket: N/A.
* Mounting Holes Diameter: 0.22-in , 5.6mm.
* Mounting Holes B.C.D.: 7.75-in , 196.9mm.
* Depth: 3.06-in , 77.7 mm.
* Net Weight: 3.1 lbs, 1.41 kg.
* Shipping Weight: 3.9 lbs, 1.77 kgs.
* Materials of Construction.
* Coil Construction: Copper voice coil.
* Coil Former: Polyimide former.
* Magnet Composition: Ferrite magnet.
* Core Details: None-vented core.
-----------------------------------.
* Basket Materials: Pressed steel basket.
* Cone Composition: Paper cone.
* Cone Edge Composition: Full paper cone.
* Dust Cap Composition: Zurette dust cap.