HP 20cm acoustic Eminence ACOUSTINATOR™ CX2008
[ACOU CX2008-8] Avis/Critiques Recommended for full-range, acoustic Instruments in both sealed and vented enclosures. Co-axial for extended HF.
SPECIFICATION
Nominal Basket Diameter 8", 203.2mm
Nominal Impedance* 8 ohms
Power Rating
Watts 200W
Music Program
Resonance 57Hz
Usable Frequency Range 60Hz-3.5kHz
Sensitivity*** 90.8
Magnet Weight 38 oz.
Gap Height 0.312", 7.92mm
Voice Coil Diameter 2", 50.8mm
THIELE & SMALL PARAMETERS
Resonant Frequency (fs) 57Hz
DC Resistance (Re) 5.4
Coil Inductance (Le) 0.62mH
Mechanical Q (Qms) 9.8
Electromagnetic Q (Qes) 0.40
Total Q (Qts) 0.39
Compliance Equivalent Volume (Vas) 21.5 liters / 0.76 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 64cc
Mechanical Compliance of Suspension (Cms) 0.33mm/N
BL Product (BL) 10.7 T-M
Diaphram Mass inc. Airload (Mms) 24 grams
Efficiency Bandwidth Product (EBP) 143
Maximum Linear Excursion (Xmax) 3.0mm
Surface Area of Cone (Sd) 214.1 cm2
Maximum Mechanical Limit (Xlim) 6.0mm
MOUNTING INFORMATION
Recommended Enclosure
Sealed 11-14 liters/ 0.38-0.48 cu.ft.
Vented 11-31 liters/ 0.4-1.1 cu.ft.
Overall Diameter 8.24", 209.2mm
Baffle Hole Diameter 7.13", 181mm
Front Sealing Gasket fitted as standard
Rear Sealing Gasket
Mounting Holes Diameter 0.22", 5.5mm
Mounting Holes B.C. D. 7.75", 196.9mm
Depth 3.6", 92mm
Net Weight 6.7 lbs., 3 kg
Shipping Weight 7.4 lbs., 3.4 kg
MATERIALS OF CONSTRUCTION
Coil Construction Copper voice coil
Coil Former Polyimide former
Magnet Composition Ferrite magnet
Core Details Tapered coax core
Basket Materials Pressed steel basket
Cone Composition Polypropylene Cone
Cone Edge Composition Rubber 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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