Haut parleur guitare Eminence COMMONWEALTH™ 15
[COMMONWEALTH-4] Avis/Critiques Clean, warm, full, non-distorted, un-adulterated guitar
tone.
Coloration: Warm and rich, but also very clean and
well defined. Great presence! Very full and smooth. Very little cone break-up,
but likes Overdrive.
Genre: All Genres.
SPECIFICATION
Nominal Basket
Diameter 15", 381mm
Nominal Impedance* 4 ohms
Power
Rating
Watts 225W
Music Program
Resonance 52Hz
Usable Frequency Range 50Hz-4kHz
Sensitivity***
100.8
Magnet Weight 109 oz.
Gap Height 0.29", 7.2mm
Voice Coil Diameter 4", 101.6mm
THIELE & SMALL
PARAMETERS
Resonant Frequency (fs) 52Hz
DC Resistance (Re) 3.72
Coil Inductance (Le) 0.22mH
Mechanical Q (Qms) 6.75
Electromagnetic Q (Qes) 0.57
Total Q (Qts) 0.53
Compliance Equivalent Volume (Vas) 163
liters / 5.8 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 29cc
Mechanical Compliance of Suspension (Cms) 0.15mm/N
BL
Product (BL) 11.8 T-M
Diaphram Mass inc. Airload
(Mms) 65 grams
Efficiency Bandwidth Product (EBP)
91
Maximum Linear Excursion (Xmax) 0.3mm
Surface Area of Cone (Sd) 889.6 cm2
Maximum Mechanical
Limit (Xlim)
MOUNTING INFORMATION
Recommended Enclosure
Sealed
Acceptable
Vented Acceptable
Overall
Diameter 15.28", 388.0mm
Baffle Hole Diameter
14.06", 357.0mm
Front Sealing Gasket fitted as
standard
Rear Sealing Gasket
Mounting Holes Diameter 0.26", 6.5mm
Mounting Holes
B.C. D. 14.57", 370.0mm
Depth 6", 152mm
Net Weight 22.6 lbs., 10.3 kg
Shipping Weight
24.8 lbs., 11.3 kg
MATERIALS OF
CONSTRUCTION
Coil Construction
Aluminum voice coil
Coil Former Polyimide former
Magnet Composition Ferrite magnet
Core Details
Vented core
Basket Materials Die-cast aluminum
basket
Cone Composition Paper Cone
Cone
Edge Composition Cloth cone edge
Dustcap Composition
Aluminum 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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