Eminence ALPHA-15A User Manual

Specification

SPL vs Freq

Nominal Basket Diameter Nominal Impedance* Power Rating** Watts Music Program Resonance Usable Frequency Range*** Sensitivity Magnet Weight Gap Height Voice Coil Diameter

Thiele & Small Parameters

Resonant Frequency (fs) DC Resistance (Re) Coil Inductance (Le) Mechanical Q (Qms) Electromagnetic Q (Qes) Total Q (Qts) Compliance Equivalent Volume (Vas) Peak Diaphragm Displacement Volume (Vd) Mechanical Compliance of Suspension (Cms) BL Product (BL) Diaphragm Mass inc. Airload (Mms)

Efciency Bandwidth Product (EBP)

Maximum Linear Excursion (Xmax) Surface Area of Cone (Sd) Maximum Mechanical Limit (Xlim)

260.00 liters / 9.20 cu.ft.

Mounting Information

Recommended Enclosure Volume Sealed Vented Overall Diameter

Bafe Hole Diameter

Front Sealing Gasket Rear Sealing Gasket Mounting Holes Diameter Mounting Holes B.C.D. Depth Net Weight Shipping Weight

71.00-85.00 liters/2.50-3.00cu.ft.

106.00-177.00 liters/3.75-6.25 cu.ft.

Materials of Construction

Copper voice coil Polyimide former Ferrite magnet Vented and extended core Pressed steel basket Paper Cone Cloth cone edge Solid composition paper dust cap

15”, 381mm

8 ohms

200W 400W

41Hz

46Hz-3.50kHz

97.00

25 oz.

0.25”, 6.35mm

1.50”, 38.10mm

41Hz

5.88

0.84mH

7.23

1.53

1.26

325.00cc

0.25mm/N

7.70 T-M

59 grams

27.00

3.80mm

856.30 cm2

8.40mm

15.15”, 384.80mm

13.87”, 352.30mm

Fitted as standard Fitted as standard

0.25”, 6.40mm

14.56”, 369.90mm

5.83”, 148mm

6.70 lbs., 3 kg

8.80 lbs., 4 kg

ALPHA-15A American Standard Series

Recommended for professional audio and bass guitar applications as a woofer in a vented or sealed enclosure.

dBSPL

110

105

100

20 Hz50100 200500 1K 2K 5K 10K20K

Please inquire about 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/bafe | 2ft. X 2ft. bafe is built into the wall with the speaker mounted ush against a steel ring for minimum diffraction | Haer P1500 Trans-Nova amplier | 2700 cu.ft. chamber with

berglass on all six surfaces (three with custom-made wedges)

Ohm