Eighteen Sound 12MB710 12" Mid-Bass Speaker 1000 Watts 8-Ohms, Weather protected Cone

The 12MB710 is a very high sensitivity (100dB 1W/1m) midbass driver with high power handling capabilities. It can be used as either a bass/mid driver in compact 2-way reflex enclosures or as a direct radiating or horn loaded, dedicated midrange driver, in multi-way touring and fixed installation concert and arena systems.

Its curvilinear paper cone made from a special high strength wood pulp, has been designed to achieve the best possible linearity within its intended frequency range and to control bell-mode resonances around the cone circumference. The cone is carried by a multiroll suspension formed of a linen-like material, which is more resistant to aging and fatigue than traditional materials.

The 75 mm diameter state-of-the-art copper voice coil employs our Interleaved Sandwich Voice coil (ISV) technology. This results in an extremely linear motor assembly with a reduced tendency for eccentric behavior when driven hard. The excellent performance capabilities of this loudspeaker are further enhanced by the Single Demodulating Rings (SDR) designed to dramatically reduce the intermodulation and harmonic distortion and improve transient response.

The magnetic structure has been optimized using FEA CAD resource, maximizing the flux density in the voice coil gap and its cooling. An exclusive treatment has been applied to the cone giving it water repellent properties.

Specifications

• Nominal Impedance: 8 ?

• Minimum Impedance: 6.4 ?

• Nominal Power Handling: 500 W

• Continuous Power Handling: 1000 W

• Sensitivity: 100.0 dB

• Frequency Range
  90 - 4000 Hz

• Voice Coil Diameter: 75 mm (3.0 in)

• Winding Material: copper

• Winding Depth: 15.0 mm (0.59 in)

• Magnetic Gap Depth: 10.0 mm (0.39 in)

Design

• Surround Shape: M-roll

• Cone Shape: Curvilinear

• Magnet Material: Ferrite

• Woofer Cone Treatment: Weather protected

• Recommended Enclosure: 25.0 dm3 (0.88 ft3)

• Recommended Tuning: 60 Hz

Parameters

• Resonance Frequency: 46 Hz

• Re: 5.0 ?

• Qes: 0.2

• Qms: 10.3

• Qts: 0.2

• Vas: 81.0 dm3 (2.86 ft3)

• Sd: 531.0 cm2 (82.31 in2)

• ??: 3.8 %

• Xmax: 5.0 mm

• Xvar: 6.1 mm

• Mms: 59.0 g

• Bl: 20.5 Txm

• Le: 0.79 mH

• EBP:230 Hz

Mounting and Shipping Info

• Overall Diameter: 310 mm (12.2 in)

• Bolt Circle Diameter: 295 mm (11.61 in)

• Baffle Cutout Diameter: 283.0 mm (11.14 in)

• Depth: 142 mm (5.59 in)

• Flange and Gasket Thickness: 13 mm (0.52 in)

• Net Weight: 7.8 kg (17.2 lb)

• Shipping Weight: 8.3 kg (18.3 lb)

• 1 hours test made with continuous pink noise signal within the range Fs-10Fs.
• Power calculated on rated minimum impedance. Loudspeaker in free air.

• 2 Power on Continuous Program is defined as 3 dB greater than the Nominal rating.

• 3 Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.