12W700 LF Ferrite Transducer

Eighteen Sound - 12W700 LF Ferrite Transducer

Code: 18-12W700-8


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Product Description

12W700 LF Ferrite Transducer

Key Features

  • 98 dB SPL 1W / 1m average sensitivity
  • 75 mm (3 in) Interleaved Sandwich Voice coil (ISV)
  • 450 W AES power handling
  • Excellent transient response
  • Weather protected cone and plates for outdoor usage
  • Improved heat dissipation via unique basket design
  • Ideal for compact two way, multiway systems and subwoofer applications

The 12W700 meets the specific market requirement for a loudspeaker which combines the excellent linearity, good efficiency and high power handling of the 15W700 model but in a 12 inch (300mm) chassis for use in more compact systems. It is primarily intended for application in compact reflex and band-pass enclosures but can also be used for horn loaded configurations. The ribbed curvilinear paper cone has been made from a special high strength woodpulp 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 an unusually deep profile, triple roll suspension made from a polycotton material which is more resistant to aging and fatigue than traditional cotton-based ones. The 75 mm (3 inch) diameter voice coil employs the Interleaved Sandwich Voice coil (ISV) technology, in which a high strength fiberglas former carries windings on both the outer and inner surfaces to achieve a mass balanced coil. This results in an extremely linear motor assembly with a reduced tendency for eccentric behavior when driven hard. The magnetic structure has been optimized using FEACAD resource to maximize the flux density in the voice coil gap. Voice coil cooling has been achieved by incorporating airways between the chassis back plate and the top plate of the magnet, allowing heated air from the voice coil and gap to be channeled away and dissipated by the chassis basket. Due to the increasing use of audio systems at outdoor events, the ability to perform in adverse weather conditions or in high-humidity areas is an essential feature of the 12W700. This has been achieved using an exclusive cone and magnet plate treatment process which increases resistance to corrosion and renders the cone water repellent.


Nominal Diameter 300 mm (12 in)
Rated Impedance 8 Ohm
AES Power 450 W
Program Power 700 W
Peak Power 1500 W
Sensitivity 98 dB
Frequency Range 55 - 4200 Hz
Power Compression @-10dB 0,8 dB
Power Compression @-3dB 2,3 dB
Max Recomm. Frequency 1700 Hz
Recomm. Enclosure Volume 40 - 90 lt. (1,41 - 3,18 cuft)
Minimum Impedance 7 Ohm at 25°C
Max Peak To Peak Excursion 34 mm (1,34 in)
Voice Coil Diameter 75 mm (3 in)
Voice Coil winding material aluminum
Suspension Triple Roll, Polycotton
Cone Ribbed Curvilinear, Paper

Thiele Small Parameters

Fs 58 Hz
Re 5,7 Ohm
Sd 0,0531 sq.mt. (82,31 sq.in.)
Qms 3,93
Qes 0,37
Qts 0,36
Vas 55 lt. (1,94 cuft)
Mms 51 gr. (0,11 lb)
BL 17,7 Tm
Linear Mathematical Xmax ± 6,5 mm (± 0,26 in)
Le (1kHz) 1,48 mH
Ref. Efficiency 1W@1m (half space) 97,2 dB

Mounting information

Overall diameter 315 mm (12,4 in)
N. of mounting holes and bolt 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 (5,80 in)
Flange and gasket thickness 16,5 mm (0,65 in)
Net weight 8,2 kg (18,1 lb)
Shipping weight 9 kg (19,87 lb)
Packaging Dimensions 9 kg (19,87 lb)