Haut-parleur Eminence ALPHA-15A
[ALPHA-15A-8] Avis/Critiques SPECIFICATION
Nominal Basket
Diameter 15", 381mm
Nominal Impedance* 8 ohms
Power
Rating
Watts 200W
Music Program 400W
Resonance 41Hz
Usable Frequency Range 46Hz-3.5kHz
Sensitivity*** 97
Magnet Weight 25 oz.
Gap Height 0.25",
6.35mm
Voice Coil Diameter 1.5", 38.1mm
THIELE & SMALL
PARAMETERS
Resonant Frequency (fs) 41Hz
Download PDF Spec Sheet
DC Resistance (Re) 5.88
Coil Inductance (Le) 0.84mH
Mechanical Q (Qms) 7.23
Electromagnetic Q (Qes) 1.53
Total Q (Qts) 1.26
Compliance Equivalent Volume (Vas) 260.0 liters / 9.2 cu.ft.
Peak
Diaphragm Displacement Volume (Vd) 325cc
Mechanical Compliance of
Suspension (Cms) 0.25mm/N
BL Product (BL) 7.7 T-M
Diaphram
Mass inc. Airload (Mms) 59 grams
Efficiency Bandwidth Product
(EBP) 27
Maximum Linear Excursion (Xmax) 3.8mm
Surface Area
of Cone (Sd) 856.3 cm2
Maximum Mechanical Limit
(Xlim) 8.4mm
MOUNTING INFORMATION
Recommended Enclosure
Sealed 71-85
liters/2.5-3 cu.ft.
Vented 106-177 liters/3.75-6.25
cu.ft.
Overall Diameter 15.15", 384.8mm
Baffle Hole Diameter 13.77", 349.6mm
Front Sealing
Gasket fitted as standard
Rear Sealing Gasket fitted
as standard
Mounting Holes Diameter 0.25",
6.4mm
Mounting Holes B.C. D. 14.56", 369.9mm
Depth 5.83", 148mm
Net Weight 6.7 lbs., 3
kg
Shipping Weight 8.8 lbs., 4 kg
MATERIALS OF
CONSTRUCTION
Coil Construction
Copper voice coil
Coil Former Polyimide former
Magnet Composition Ferrite magnet
Core Details
Vented and extended core
Basket Materials Pressed steel
basket
Cone Composition Paper Cone
Cone
Edge Composition Cloth cone edge
Dustcap Composition Solid
composition paper 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 on axis output across the usable frequency range when applying 1W/1m
into the nominal impedance, i.e. 2.83V/8Ω, 4V/16Ω. 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 speaker mounted flush
against a steel ring for minimum diffraction | Carver PM-120 amplifier | 2700ft3
chamber with fiberglass on all six surfaces (three with custom-made wedges).
|
