Haut parleur 30cm Eminence BLACK POWDER™
[BLACK POWDER-8] Avis/Critiques An explosive 12" American guitar speaker with a bright concussion.
Coloration: Raw and bright with tight bass and explosive mids and highs.
Genre: Southern Rock, College Rock, Heavy Metal, and Grunge.
SPECIFICATION
Nominal Basket Diameter 12", 304.8mm
Nominal Impedance* 8 ohms
Power Rating
Watts 75W
Music Program
Resonance 72Hz
Usable Frequency Range 70Hz-5kHz
Sensitivity*** 100
Magnet Weight 30 oz.
Gap Height 0.312", 7.92mm
Voice Coil Diameter 1.5", 38.1mm
THIELE & SMALL PARAMETERS
Resonant Frequency (fs) 72Hz
DC Resistance (Re) 7.1
Coil Inductance (Le) 0.37mH
Mechanical Q (Qms) 14.98
Electromagnetic Q (Qes) 0.75
Total Q (Qts) 0.72
Compliance Equivalent Volume (Vas) 82.4 liters / 2.9 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 25cc
Mechanical Compliance of Suspension (Cms) 0.22mm/N
BL Product (BL) 9.9 T-M
Diaphram Mass inc. Airload (Mms) 23 grams
Efficiency Bandwidth Product (EBP) 96
Maximum Linear Excursion (Xmax) 0.5mm
Surface Area of Cone (Sd) 519.5 cm2
Maximum Mechanical Limit (Xlim)
MOUNTING INFORMATION
Recommended Enclosure
Sealed
Vented Acceptable
Overall Diameter 12.23", 310.5mm
Baffle Hole Diameter 11.02", 279.8mm
Front Sealing Gasket fitted as standard
Rear Sealing Gasket fitted as standard
Mounting Holes Diameter 0.25", 6.4mm
Mounting Holes B.C. D. 11.67", 296.4mm
Depth 4.6", 117mm
Net Weight 7 lbs., 3.2 kg
Shipping Weight 9 lbs., 4.1 kg
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 Paper cone edge
Dustcap Composition Zurette dust cap
FOOTNOTES
* Please consult eminence.com for specifications of models with alternative impedances.
** Multiple units exceed published rating evaluated under EIA 426A noise source and test standard while in a free-air, non-temperature controlled environment.
*** The average output across the usable frequency range when applying 1W/1M into the nominal impedance. Ie: 2.83V/8ohms, 4V/16ohms. Eminence response curves are measured under the following conditions: All speakers are tested at 1w/1m using a variety of test set-ups for the appropriate impedance | LMS using 0.25” supplied microphone (software calibrated) mounted 1m from wall/baffle | 2ft. X 2ft. baffle is built into the wall with the speaker mounted flush against a steel ring for minimum diffraction | Hafler P1500 Trans-Nova amplifier | 2700 cu.ft. chamber with fiberglass on all six surfaces (three with custom-made wedges).
**** BETA 8CX, 10CX, 12CX and ACOUSTINATOR™ CX2008 are coaxial speakers with tweeter sold separately. Published Usable Frequency response contingent upon use of APT 50 HF Driver.
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