Pro Audio

American Standard Series

Get Adobe Reader Cab Design Spec Sheet

Alpha 2-8 (4-Pack)

Ideal for tight fitting column and line array applications, the Alpha 2 features a 0.64” copper voice coil and 2.7 oz. ferrite magnet. With under spider venting and a flux source cap, this 8 ohm driver lets the heat out while containing the magnetic flux, which is critical for multi-unit designs packed tightly together. Rated at 30 watts program power, the Alpha 2 has a wide usable frequency range of 200 Hz – 20 kHz.

Suggested Retail  $49.99
Your Price  $39.99

For contiguous USA shipments only.

  • Free Shipping
  • Free Tech Support
  • 7-Year Warranty*
*Warranty policy may vary outside the USA.
This table charts the specifications for the Alpha 2-8 (4-Pack) speaker
Speaker Detail
Specification
Nominal Basket Diameter2", 51 mm
Nominal Impedance*8 Ω
Power Rating*
Program Power30 W
Watts20 W
Resonance186 Hz
Usable Frequency Range200 Hz - 20 kHz
Sensitivity*83.8 dB
Magnet Weight3 oz.
Gap Height0.12", 3.1 mm
Voice Coil Diameter0.64", 16 mm
Thiele & Small Parameters
Resonant Frequency (fs)186 Hz
DC Resistance (Re)6.4 Ω
Coil Inductance (Le)0.13m H
Mechanical Q (Qms)3.06
Electromagnetic Q (Qes)0.94
Total Q (Qts)0.72
Compliance Equivalent Volume (Vas)0.18 liters / 0.01 cu.ft.
Peak Diaphragm Displacement Volume (Vd)2.1 cc
Mechanical Compliance of Suspension (Cms)0.84 mm/N
BL Product (BL)2.64 T-M
Diaphragm Mass Inc. Airload (MMs)1 grams
Efficiency Bandwidth Product (EBP)198
Maximum Linear Excursion (Xmax)1.7 mm
Surface Area of Cone (Sd)12.37 cm2
Maximum Mechanical Limit (Xlim)2.2 mm
Mounting Information
Recommended Enclosure Volume
Sealed 0.42-0.54 liters / .015-.019 cu.ft.
Vented 0.37-0.57 liters / .013-.02 cu.ft.
Driver Volume Displaced0.001 cu.ft. / 0.03 liters
Major Diameter2.75", 69.9 mm
Flat to Flat Diameter2.13", 54 mm
Baffle Hole Diameter2", 50.8 mm
Front Sealing GasketYes
Rear Sealing GasketN/A
Mounting Holes Diameter0.15", 3.81mm
Mounting Holes B.C.D.2.36", 59.94mm
Depth1.63", 41.4 mm
Net Weight0.4 lbs, 0.18 kg
Shipping Weight2 lbs, 0.91 kgs
Materials of Construction
Coil ConstructionCopper
Coil FormerPolyimide
Magnet CompositionFerrite
Core DetailsSolid with flux source cap
  
Basket MaterialsPressed Steel
Cone CompositionPaper/Poly Sandwich
Cone Edge CompositionCloth
Dust Cap CompositionPoly
Hide
Footnotes

Multiple units exceed published ratings evaluated under EIA 426A specification while tested in a free-air, non-temperature-controlled environment. Multiple compression drivers exceeded published ratings evaluated under EIA-426A or AES specification while mounted on Eminence’s H290, H290S, or H2EA horn in a non-temperature-controlled environment.

The average 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 | 2 ft. x 2 ft. baffle is built into the wall with the speaker mounted flush against a steel ring for minimum diffraction | Yamaha P3500S amplifier | 2700 cu. ft. chamber with fiberglass on all six surfaces (three with custom-made wedges). Compression drivers were tested using a 2ft x 2ft baffle built into the wall with horn front mounted.

BETA 8CX, 10CX and 12CX are coaxial speakers with tweeter sold separately. The data for these coaxial woofers was calculated with the ASD:1001 driver screwed into the woofer, but not active.

Prices, specifications and product cosmetics are subject to change without notice.