Eminence describe the Patriot 820H as a 4 ohm hemp cone speaker with rich, warm, full bodied tone with fat, punchy lows, smooth, but defined highs, and a nice break up. Prominent mids, but with a warm, smooth texture.

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Model: Eminence 820H
note: Price includes VAT

SPECIFICATION
•Nominal Basket Diameter 8", 203.2 mm
•Nominal Impedance 4 ohms
•Power Rating Watts 20 W / Music Program N/A
•Resonance 143.55 Hz
•Usable Frequency Range 80 Hz - 4.6 kHz
•Sensitivity 96.1
•Magnet Weight 15 oz.
•Gap Height 0.25", 6.35 mm
•Voice Coil Diameter 1", 25.4 mm

THIELE & Small Parameters
•Resonant Frequency (fs) 143.55 Hz
•DC Resistance (Re) 3.64
•Coil Inductance (Le) 0.33 mH
•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) 36.70 cc
•Mechanical Compliance of Suspension (Cms) 0.13 mm/N
•BL Product (BL) 5.74 T-M
•Diaphragm Mass inc. Airload (Mms) 9.25 grams
•Efficiency Bandwidth Product (EBP) 155.79
•Maximum Linear Excursion (Xmax) 1.59 mm
•Surface Area of Cone (Sd) 230.9 cm²
•Maximum Mechanical Limit (Xlim) N/A

MOUNTING Information
•Recommended Enclosure Volume
Sealed Acceptable
Vented Acceptable
•Overall Diameter 8.24", 209.3 mm
•Baffle Hole Diameter 7.13", 181.1 mm
•Front Sealing Gasket fitted as standard
•Rear Sealing Gasket N/A
•Mounting Holes Diameter 0.22", 5.58 mm
•Mounting Holes B.C.D. 7.75", 193.85 mm
•Depth 3.06", 77.72 mm

MATERIALS of Construction
•Copper voice coil
•Polyimide former
•Ferrite magnet
•None-vented core
•Pressed steel basket
•Paper Cone
•Full paper cone
•Zurette dust cap