The 12W500 is a 500W program low frequency driver designed to satisfy the need for a 12" loudspeaker which combines excellent linearity with good sensitivity and power handling characteristics. It is primarily intended for compact bass reflex applications in enclosures as small as 50 lt, typically for two-way systems in combination with 1" compression driver. The high quality paper cone has a smooth, curvilinear profile design that eliminates bell-mode resonances within the intended frequency range. This is carried by a specially treated, dampened double half-roll linen suspension which has been designed to control excursion maintaining the piston action linearity. The 12W500 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. Voice coil cooling is 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.
Mounting and Shipping Info
Nominal Diameter300 mm ( in)
Nominal Impedance8 Ω
Minimum Impedance6.4 Ω
Nominal Power Handling1350 W
Continuous Power Handling2500 W
Frequency Range50 - 6000 Hz
Voice Coil Diameter64 mm (2.5 in)
Woofer Cone TreatmentWeather protected
Recommended Enclosure75.0 dm3 (2.65 ft3)
Recommended Tuning50 Hz
Resonance Frequency46 Hz
Vas123.0 dm3 (4.34 ft3)
Sd531.0 cm2 (82.31 in2)
Overall Diameter315 mm (12.4 in)
Bolt Circle Diameter296 mm (11.65 in)
Baffle Cutout Diameter282.0 mm (11.1 in)
Depth141 mm (5.55 in)
Flange and Gasket Thickness16 mm (0.63 in)
Net Weight5.2 kg (11.46 lb)
Shipping Weight5.9 kg (13.01 lb)
Shipping Box332 x 332 x 184 mm (13.07x13.07x7.24 in)
2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated minimum impedance. Loudspeaker in free air.
Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.