Beyma 12G40 - 8OHM

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Nominal Basket Diameter
12" / 300mm
4 or 8 ohms
AES Power Rating
500 Watts
Program Power 1,000 Watts  
Frequency Response
45Hz - 4.0kHz
Sensitivity (1W/1m)
Voice Coil Diameter
3" / 77mm
Recom. Enclosure Volume.7-2.6 ft3  /  20-70 Liters
Voice Coil Length20 mm
Air Gap Height8 mm
X Damage (peak to peak)28 mm
BL Factor18.4 N/A
Magnetic Assembly Weight13.9 lb. / 6.3 kg.

Mounting Information

Overall Diameter12.3" / 312mm
Bolt Circle Diameter11.6" / 294.5mm
Baffle Cutout Diameter- 
- Front Mount10.9" / 277.5mm
- Rear Mount11" / 280mm
No. Of Mounting Holes8
Volume Displaced By Driver0.14 ft3  /  4 Liters
Overall Depth5.47" / 139mm
Net Weight15.6 lb. / 7.1 kg.
Shipping Weight17.2 lb. / 7.8 kg.
BasketDie Cast Aluminum
SurroundTreated Cloth
Voice CoilEdgewound Copper Wire
MagnetHigh Currie Temperature Ferrite

Thiele-Small Parameters

Resonant Frequency (fs)44 Hz
Impedance (Re)6.0 ohms
Coil Inductance (Le) 2.1 mH
Mechanical Q (Qms)11.6
Electrical Factor(Qes).3
Total Q (Qts).3
Comp. Equivalent Vol. (Vas)2.86 ft3 / 81 Liters
Voice Coil Overhang (Xmax)7.0 mm
Surface Area of Cone (Sd)m20.0530m2
Moving Mass (Mms)62 Grams
Reference Efficiency2.3%
Displacement Volume (Vd)316 cm3