Beyma 8BR40/N - Woofer 8" 8ohm 91dB 50W Ferrite

The chassis features a curved diaphragm attached to a rubber surround to stabilize excursion and ensure maximum linear excursion with high efficiency and extremely low distortion The transducer was specially developed to reproduce low and mid-tones in outstanding quality

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Key Features:

• Power handling: 100 W program power
• Sensitivity: 91 dB (1W / 1m) 
• 1” copper voice coil
• Rubber surround
• Ferrite magnet The cast aluminum basket
• Flat response and low harmonic distortion 
• Extended controlled displacement: Xmax ± 6,7 mm
• 20 mm peak-to-peak excursion before damage

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Technical Specifcations:

• Nominal diameter 200 mm 8 in
• Rated impedance 8 Ω
• Minimum impedance 6,4 Ω
• Power capacity 50 WRMS
• Program power 100 W
• Sensitivity 91 dB 1W / 1m @ ZN
• Frequency range 30 - 6.000 Hz
• Recom. enclosure vol. 20 / 60 l 0,7 / 2,1 ft3
• Voice coil diameter 25,4 mm 1 in
• Bl factor 6,8 N/A
• Moving mass 0,021 kg
• Voice coil length 16 mm
• Air gap height 6 mm
• Xdamage (peak to peak) 20 mm

Thiele-Small Parameters:

• Resonant frequency, fs 30 Hz
• D.C. Voice coil resistance, Re 5,5 Ω
• Mechanical Quality Factor, Qms 2,1
• Electrical Quality Factor, Qes 0,48
• Total Quality Factor, Qts 0,39
• Equivalent Air Volume to Cms, Vas 89,1 l
• Mechanical Compliance, Cms 1300 μm / N
• Mechanical Resistance, Rms 2 kg / s
• Efficiency, η0 0,5 %
• Effective Surface Area, Sd 0,022 m2
• Maximum Displacement, Xmax4 6,7 mm
• Displacement Volume, Vd 147 cm3
• Voice Coil Inductance, Le 0,5 mH

Mounting Information:

• Overall diameter 212 mm 8,3 in
• Bolt circle diameter 198 mm 7,8 in
• Baffle cutout diameter:
• - Front mount 181 mm 7,1 in
• Depth 89 mm 3,5 in
• Volume displaced by driver 1,5 l 0,05 ft3
• Net weight 1,3 kg
• Shipping weight 1,5 kg