Nominal Basket Diameter: 12 in., 304.8mm
Nominal Impedance: 8 ohms
Power Rating: Watts 250W
Music Program: 500W
Usable Frequency Range: 43Hz-3.8kHz
Magnet Weight: 38 oz.
Gap Height: 0.312 in., 7.92mm
Voice Coil Diameter: 2 in., 50.8mmThiele & Small Parameters
Resonant Frequency (fs): 47Hz
DC Resistance (Re): 5.0
Coil Inductance (Le): 0.64mH
Mechanical Q (Qms): 6.00
Electromagnetic Q (Qes): 0.50
Total Q (Qts): 0.46
Compliance Equivalent Volume (Vas): 120.1 liters / 4.2 cu. ft.
Peak Diaphragm Displacement Volume (Vd): 237cc
Mechanical Compliance of Suspension (Cms): 0.29mm/N
BL Product (BL): 10.8 T-M
Diaphram Mass inc. Airload (Mms): 40 grams
Efficiency Bandwidth Product (EBP): 94
Maximum Linear Excursion (Xmax): 4.4mm
Surface Area of Cone (Sd): 538.9 cm2
Maximum Mechanical Limit (Xlim): 11mm Mounting Information
- Sealed: 25.5-35.4 liters, 0.9-1.25 cu.ft.
- Vented: 36.8-139 liters/1.3-4.9 cu.ft.
Overall Diameter: 12.03 in., 305.5mm
Baffle Hole Diameter: 10.95 in., 278.1mm
Front Sealing Gasket: fitted as standard
Rear Sealing Gasket: fitted as standard
Mounting Holes Diameter: 0.25 in., 6.4mm
Mounting Holes B.C. D.: 11.59 in., 294.3mm
Depth: 4.57 in., 116mm
Net Weight: 7.5 lbs., 3.4 kg
Shipping Weigh: 9.7 lbs., 4.4 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
** 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(TM) CX2008 are coaxial speakers with tweeter sold separately. Published Usable Frequency response contingent upon use of APT 50 HF Driver.Important NoteWatts:
The guaranteed long term power rating throughout the usable frequency range of the speaker.
(Translation: the speaker will operate continuously at any frequency within the speakers specified frequency range when driven at this power. The "Watts" rating is similar to RMS, but is really more indicative of long term thermal capability.) Music Program:
The speaker will safely and reliably handle the varying frequencies of musical content at this power rating. The "Music Program" rating is more indicative of what you can expect in the real world with the speaker operating within the appropriate enclosure reproducing music or vocal audio program.
- Dimensions and Weight in Packaging
- 8 Ohms
Shipping Weight: 9 lbs
Shipping Dimensions: 13 x 13 x 7 in
Manufacturer Part Number (MPN): BETA12A8