http://windsound.ro/shop/difuzoare/difuzor-mb-ferita-12mb700/

101,5 dB SPL 1W / 1m sensitivity
75 mm (3 in) Interleaved Sandwich Voice coil (ISV)
450 W AES power handling
Double Demodulating Rings (DDR) for lower distortion
Improved heat dissipation via unique basket design
Weather protected cone and plates for outdoor usage
Ideal for compact two way and multiway systems
GENERAL SPECIFICATIONS
Nominal Diameter 300 mm (12 in)
Rated Impedance 8 Ohm
AES Power 450 W
Program Power 600 W
Peak Power 1200 W
Sensitivity 101,5 dB
Frequency Range 60 ÷ 5000 Hz
Power Compression -10dB 0,4 dB
Power Compression -3dB 1,5 dB
Power Compression Full Power 2,8 dB
Max Recomm. Frequency 4000 Hz
Recomm. Enclosure Volume 10 ÷ 80 lt. (0,3 ÷ 2,83 cuft)
Minimum Impedance 5,7 Ohm at 25°C
Max Peak To Peak Excursion 22 mm (0,87 in)
Voice Coil Diameter 75 mm (3 in)
Voice Coil Winding Material aluminum
Suspension M-roll, Polycotton
Cone Curvilinear, Paper
THIELE SMALL PARAMETERS
Fs 49 Hz
Re 5 Ohm
Sd 0,0531 sq.mt. (82,31 sq.in.)
Qms 4,7
Qes 0,2
Qts 0,19
Vas 101 lt. (3,57 cuft)
Mms 41 gr. (0,09 lb)101 lt. (3,57 cuft)
BL 17,8 Tm
Linear Mathematical Xmax ± 4,5 mm (± 0,18 in)
Le (1kHz) 0,9 mH
Ref. Efficiency 1W1m (half space) 99,6 dB
MOUNTING INFORMATIONS
Overall diameter 315 mm (12,4 in)
N. of mounting holes 8
Mounting holes diameter 7,15 mm (0,28 in)
Bolt circle diameter 296 - 300 mm (11,65 - 11,8 in)
Front mount baffle cutout ø 282 mm (11,1 in)
Rear mount baffle cutout ø 282 mm (11,1 in)
Total depth 147,5 mm (5,82 in)
Flange and gasket thickness 16,5 mm (0,65 in)
Net weight 8,0 kg (17,66 lb)
Shipping weight 8,8 kg (19,43 lb)
CardBoard Packaging dimensions 332 x 332 x 184 mm (13,07 x 13,07 x 7,24 in)