Beyma 12BR70 - Woofer 12" 8ohm 93dB 125W Ferrite

This 12" bass loudspeaker has been specifically designed to deliver exceptional low frequency reproduction, with high sensitivity and extremely low distortion. It incorporates a curvilinear cone attached to a rubber surround, in order to provide suspension stability and to allow maximum excursion linearity. By combining a powerful magnet construction with a cast aluminium basket, the 12BR70 achieves high power capacity, and consequently, contributes to reduce the thermal power compression.

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Key Features:

• 250 W program power
• Sensitivity: 93 dB (1W / 1m) 
• 2” copper voice coil 
• Ferrite magnet Extended controlled displacement: Xmax ± 8 mm
• 26 mm peak-to-peak excursion before damage 
• Designed for low frequency reproduction

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Technical Specifcations:

• Nominal diameter 300 mm 12 in
• Rated impedance 8 Ω
• Minimum impedance 6,6 Ω
• Power capacity 125 WRM
• Program power 250 W
• Sensitivity 93 dB 1W / 1m @ ZN
• Frequency range 35 - 4.000 Hz
• Recom. enclosure vol. 50 / 120 l 1,8 / 4,2 ft3
• Voice coil diameter 50,8 mm 2 in
• Bl factor 12,1 N/A
• Moving mass 0,074 kg
• Voice coil length 19 mm
• Air gap height 7 mm
• Xdamage (peak to peak) 26 mm

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Thiele-Small Parameters:

• Resonant frequency, fs 31 Hz
• D.C. Voice coil resistance, Re 5,6 Ω
• Mechanical Quality Factor, Qms 4,4
• Electrical Quality Factor, Qes 0,56
• Total Quality Factor, Qts 0,50
• Equivalent Air Volume to Cms, Vas 142 l
• Mechanical Compliance, Cms 345 μm / N
• Mechanical Resistance, Rms 3,3 kg / s
• Efficiency, η0 0,8 %
• Effective Surface Area, Sd 0,054 m2
• Maximum Displacement, Xmax4 8 mm
• Displacement Volume, Vd 340 cm3
• Voice Coil Inductance, Le 0,8 mH

Mounting Information:

• Overall diameter 312 mm 12,3 in
• Bolt circle diameter 294,5 mm 11,6 in
• Baffle cutout diameter:
• - Front mount 278 mm 10,9 in
• Depth 134 mm 5,3 in
• Net weight 3,6 kg
• Shipping weight 4,3 kg