Beyma 8NMFW - Woofer 8" 8ohm 90dB 200W Ferrite

The most recent stage in Beyma’s pursuit of excellence has given birth to this new family of outstanding drivers. Our R&D department has used world class simulation aided tools and a rigorous material selection process to create this matchless set of electro-dynamic transducers. This series benefits from extreme linearity and negligible distortion that excels in small and medium range listening distances where attention to detail is paramount. NMF defines a new grade of glassy, unspoiled sound in which the best part of contenders are left behind. Some of the best engineers in our organization have been enthralled in a two-year quest using state of the art multi-physics simulation, leading prototyping techniques and unsurpassed measurement tools resulting in these precise devices working in flawless harmony. Years of experience and know-how together with cutting-edge technologies have resulted in a new generation of drivers created to perform in outstanding studio monitor and high-end loudspeaker enclosures.

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Key Features:

• High power handling and low distortion 8” woofer
• Exclusive Malt Cross®Technology Cooling System 
• Low power compression losses 
• High force factor design for top performance applications 
• FEA optimized ceramic magnetic circuit and suspensions 
• Ultra low air noise 
• Carbon fiber cone and dust cap Enhanced linear behavior 
• Double BIMAX spider and NBR surround 
• 2” QUATTRO in/out aluminum voice coil 
• Optimized triple aluminum and copper demodulating circuit 
• Extended controlled displacement: Xmax ± 9 mm 
• 43 mm peak-to-peak excursion before damage

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Technical Specifcations:

• Nominal diameter 200mm 8in
• Rated impedance 8Ω
• Minimum impedance 7.4Ω
• Power capacity 200 WAES
• Program power 400 W
• Long term max. power 600 W
• Sensitivity 90 dB 1W / 1m @ ZN
• Frequency range 30 - 2,500 Hz
• Voice coil diameter 50.8mm 2in
• Bl factor 13.4 N/A
• Moving mass 0.048 kg
• Voice coil length 20 mm
• Air gap height 6mm
• Xdamage (peak to peak) 43 mm

Thiele-Small Parameters:

• Resonant frequency, fs 37 Hz
• D.C. Voice coil resistance, Re 5.7 Ω
• Mechanical Quality Factor, Qms 7.6
• Electrical Quality Factor, Qes 0.36
• Total Quality Factor, Qts 0.34
• Equivalent Air Volume to Cms, Vas 27 l
• Mechanical Compliance, Cms 376 μm/N
• Mechanical Resistance, Rms 1.5kg/s
• Efficiency, η0 0.4%
• Effective Surface Area, Sd 0.0227 m2
• Maximum displacement, Xmax5 9mm
• Displacement Volume, Vd 204 cm3
• Voice coil inductance, Le 1.1 mH

Mounting Information:

• Overall diameter 227 mm 8.94 in
• Bolt circle diameter 210 mm 8.27 in
• Baffle cutout diameter:
• - Front mount 181mm 7.12in
• Depth 137mm 5.4in
• Net weight 3.7kg
• Shipping weight 4.4kg