Eminence 820H: 8 inch Hemp Cone 4 ohm Guitar Speaker
Featuring a hemp cone, 1” voice coil and lightweight 15 oz. ceramic magnet, the 4 ohm 820H offers 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 820H also offers prominent mids, but with a warm, smooth texture.
Click Here to Download 4 ohm PDF Spec Sheet
| SPECIFICATION | |
| 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 | Paper cone |
| Cone Edge Composition | Full paper cone |
| Dust Cap Composition | Zurette dust cap |
“There are a lot of 8” amplifiers on the market, but very few have a speaker capable of delivering quality tone.” said Anthony Lucas, Eminence tech support specialist. “The 820H sounds nearly like a 10” speaker and doesn’t break up too early or fall apart like other 8” speakers I’ve heard. It could enhance the tone in any suitable amplifier on the market, and is actually the first 8” speaker I’ve ever heard that I consider worthy of putting in something like a vintage Fender Champ.”
