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.
Characteristics
Series | Patriots | |
Model | 820H | |
Application | 8" Open or Closed Back | |
Configuration | 1, 2, or 4 X 8" | |
Low End Response | Aggressive | |
Low End Shape | Fat | |
Mid-Range Response | Moderate | |
Mid-Range Shape | Warm | |
High-End Response | Moderate | |
Volume/Power | Loudest | |
Overall Coloration* | 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. | |
Break-up Modes | Medium | |
Power Range | Up to 20 watts | |
Instrument* | Lead/Rhythm Guitar, Harmonica | |
Genre of Music* | Jazz, Rock, Country, and Blues |
Specifications
Download Spec SheetSPECIFICATION | |
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 |
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 | Non-vented core |
Basket Materials | Pressed steel basket |
Cone Composition | Hemp paper cone |
Cone Edge Composition | Full paper cone |
Dust Cap Composition | Zurette dust cap |