12G40: G40 Series
Features:

• Voice coil: edgewound copper wire with high temperature bonding strength. Polyimide fiber glass former able to withstand high temperatures. 
• Cone: paper cone capable to endure the most extreme conditions.
• Surround: treated cloth to assure good retaining of elasticity in despite of continuing use.
• Spider: treated cotton fibres. 
• Metal parts: anti-corrosion coated back plate designed to resist aggressive environmental conditions.
• Basket: specially designed die cast aluminium basket to avoid disturbing resonances. 
• Magnet: high Curie temperature ferrite.

Specifications:

• Nominal diameter: 300 mm 12 in
• Nominal impedance: 8 ohm
• Minimum impedance  : 6.7 ohm
• Power capacity: 500 W AES
• Program power: 1000 W
• Sensitivity: 97 dB 1 W @ 1 m @ 2Π
• Frequency range: 35-4000 Hz
• Recommended enclosure volume: 20 / 70 l 0.7 / 2.6 ft.³
• Voice coil diameter: 77 mm 3 in
• BL factor: 18.4 N / A
• Moving mass: 0.062 kg
• Winding length: 17.5 mm
• Air gap height : 8 mm
• Xdamage pp: 28 mm

Downloads:

• User Manual