Speaker - Eminence® Patriot, 8", 820H, 20W, 4Ω

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Speaker - Eminence® Patriot, 8", 820H, 20W, 4Ω

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Lead/Rhythm 8" guitar speaker. A rich, warm, full bodied tone that emulates a larger cone, with fat, punchy lows, smooth, but defined highs, and a nice break up. The mids are prominent, but with a warm, smooth texture.

Nominal Basket Diameter 8", 203 mm
Nominal Impedance* 4 Ω
Power Rating*
Program Power 40 W
Watts 20 W
Resonance 144 Hz
Usable Frequency Range 80 Hz - 4.6 kHz
Sensitivity* 96.1 dB
Magnet Weight 15 oz.
Gap Height 0.25", 6.4 mm
Voice Coil Diameter 1", 25 mm
Resonant Frequency (fs) 144 Hz
DC Resistance (Re) 3.64 Ω
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", 209.3 mm
Baffle Hole Diameter 7.13", 181.1 mm
Front Sealing Gasket Yes
Rear Sealing Gasket N/A
Mounting Holes Diameter 0.22", 5.6mm
Mounting Holes B.C.D. 7.75", 196.9mm
Depth 3.06", 77.7 mm
Net Weight 3.1 lbs, 1.41 kg
Shipping Weight 3.9 lbs, 1.77 kgs
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
RoHS Compliant
Item ID:
Product Measurements
Baffle Hole Diameter7.13", 181.1 mm
Basket MaterialsPressed steel basket
Bl Product (bl)5.74 T-M
Coil ConstructionCopper voice coil
Coil FormerPolyimide former
Coil Inductance (le)0.33m H
Compliance Equivalent Volume (vas)9.62 liters / 0.34 cu.ft.
Cone CompositionPaper cone
Cone Edge CompositionFull paper cone
Core DetailsNone-vented core
Dc Resistance (re)3.64 Ω
Depth3.06", 77.7 mm
Diameter8 in.
Diaphragm Mass Inc. Airload (mms)9 grams
Driver Volume Displaced0.018 cu.ft. / 0.51 liters
Dust Cap CompositionZurette dust cap
Efficiency Bandwidth Product (ebp)156
Electromagnetic Q (qes)0.92
Front Sealing GasketYes
Gap Height0.25", 6.4 mm
Magnet CompositionFerrite magnet
Magnet Weight15 oz.
Maximum Linear Excursion (xmax)1.59 mm
Maximum Mechanical Limit (xlim)N/A
Mechanical Compliance Of Suspension (cms)0.13 mm/N
Mechanical Q (qms)18.78
Mounting Holes B.c.d.7.75", 196.9mm
Mounting Holes Diameter0.22", 5.6mm
Net Weight3.1 lbs, 1.41 kg
Nominal Basket Diameter8", 203 mm
Nominal Impedance*4 Ω
Overall Diameter8.24", 209.3 mm
Peak Diaphragm Displacement Volume (vd)36.7 cc
Program Power40 W
Rear Sealing GasketN/A
Resonance144 Hz
Resonant Frequency (fs)144 Hz
Sensitivity*96.1 dB
Surface Area Of Cone (sd)230.9 cm2
Total Q (qts)0.88
Usable Frequency Range80 Hz - 4.6 kHz
Voice Coil Diameter1", 25 mm
Watts20 W
Packaging Information
Packaging Dimensions9.25 in. × 9.25 in. × 4.125 in.
Weight (Packaging)3.9 lbs.

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Specifications, Files, and Documents

Sound Samples:

PDF: Specification Sheet (239.45 KB)Specification Sheet

Questions and Answers

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Asked by Anonymous on November 9th, 2017. 1 person subscribed to this question
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Matt H.
November 9th, 2017
This speaker has a diameter of 8" and a depth of 3.06”. You will want to measure your speaker/cab to insure a proper fit.
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