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Eminence

820H 20W 4ohm

Šifra Proizvoda: 9714

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Kratak opis

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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GUITAR / BASS PATRIOT SERIES

 

diagram

 

SPECIFICATION
Nominal Basket Diameter 8", 203 mm
Nominal Impedance* 4 Ω
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", 6.4 mm
Voice Coil Diameter 1", 25 mm
THIELE & SMALL PARAMETERS
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
MOUNTING INFORMATION
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
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

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