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1" Exit HF Drivers

BM-D450 / BM-D450S


The P.Audio has redefined its BM series of compression drivers. The BMD450S is a state of the art high output compression driver. New developments P.Audio Research and Development have produced new levels of performance. State of the art manufacturing methods insure extremely reliable and consistent designs.

The new BM-D450S driver utilizes the recently developed CRT™ technology to substantially improve both the time domain response and reduce distortion through the critical upper vocal range (1.5kHz to 5kHz). This new technology, called Cavity Resonance Technology ™ (CRT) acts to acoustically minimize the cavity found under all suspension driver suspension elements. By employing CRT technology, P.Audio engineers have been able to greatly improve the vocal accuracy in the frequency range where vocal intelligibility is located. Magnetic fluid has also been added to increase thermal transfer and mechanical damping. These changes to the diaphragm and magnet structure assembly have also increased the sound pressure levels and smoothed the response between 10kHz and 20kHz. The result is a more accurate system, particularly for vocal range program material.

The BM-D450S is a medium format titanium based diaphragm assembly mated to a close spaced circumferential phase plug geometry. The voice coil is a rectangular geometry, high temperature aluminum to insure extended high frequency response. This diaphragm geometry is ideally suited for foreground/background high performance pa systems.

The 1.0 inch (25.4mm) throat exit makes the 450S an excellent choice for extended bandwidth and ultra high frequency applications such as three way designs. The BM-D450S is ideally suited for line array applications or other applications where a mid bass horn or direct radiator driver is also used. This medium format throat and medium format diaphragm insures wide dispersion at very high frequencies and is an excellent choice for three way systems or medium power two way designs. The 1.0 inch throat is compatible with a variety of P.Audio horns and also compatible with industry standard 1.0 inch screw/thread on horns.

The Ferrite based permanent magnetic system produces a very high efficiency and value. This makes the BM-D450S ideal for professional applications as well as fixed installation systems. The large format Ferrite permanent magnet produces a very high conversion efficiency.

GENERAL SPECIFICATIONS

  Model   BM-D450   BM-D450S
  Throat diameter   25 mm/1 in   25 mm/1 in
  Mounting type   Bolt on   Screw on
  Nominal impedance   8Ω   8Ω
  D.C. resistance   6.4Ω   6.4Ω
  Power capacity   80 W Continuous Program   80 W Continuous Program
  Sensitivity   108 dB   108 dB
  Frequency range   1500Hz - 18kHz   1500Hz - 18kHz
  Recommended crossover   2.2Hz 12dB/oct   2.2Hz 12dB/oct
  Voice coil diameter   44.4 mm/1.75 in   44.4 mm/1.75 in
  Magnetic assembly weight   2.5 kg/5.5 lb   2.7 kg/5.94 lb
  Flux Density   1.7 T   1.7 T
  Magnet   Strotium Ferrite   Strotium Ferrite
  Diaphragm material   Titanium   Titanium
  Voice coil material   Edge Wound Copper Clad
  Aluminium Ribbon
  Edge Wound Copper Clad
  Aluminium Ribbon
  Voice coil former   Resin Bonded Kapton   Resin Bonded Kapton

BM-D450 / BM-D450S


The P.Audio has redefined its BM series of compression drivers. The BMD450S is a state of the art high output compression driver. New developments P.Audio Research and Development have produced new levels of performance. State of the art manufacturing methods insure extremely reliable and consistent designs.

The new BM-D450S driver utilizes the recently developed CRT™ technology to substantially improve both the time domain response and reduce distortion through the critical upper vocal range (1.5kHz to 5kHz). This new technology, called Cavity Resonance Technology ™ (CRT) acts to acoustically minimize the cavity found under all suspension driver suspension elements. By employing CRT technology, P.Audio engineers have been able to greatly improve the vocal accuracy in the frequency range where vocal intelligibility is located. Magnetic fluid has also been added to increase thermal transfer and mechanical damping. These changes to the diaphragm and magnet structure assembly have also increased the sound pressure levels and smoothed the response between 10kHz and 20kHz. The result is a more accurate system, particularly for vocal range program material.

The BM-D450S is a medium format titanium based diaphragm assembly mated to a close spaced circumferential phase plug geometry. The voice coil is a rectangular geometry, high temperature aluminum to insure extended high frequency response. This diaphragm geometry is ideally suited for foreground/background high performance pa systems.

The 1.0 inch (25.4mm) throat exit makes the 450S an excellent choice for extended bandwidth and ultra high frequency applications such as three way designs. The BM-D450S is ideally suited for line array applications or other applications where a mid bass horn or direct radiator driver is also used. This medium format throat and medium format diaphragm insures wide dispersion at very high frequencies and is an excellent choice for three way systems or medium power two way designs. The 1.0 inch throat is compatible with a variety of P.Audio horns and also compatible with industry standard 1.0 inch screw/thread on horns.

The Ferrite based permanent magnetic system produces a very high efficiency and value. This makes the BM-D450S ideal for professional applications as well as fixed installation systems. The large format Ferrite permanent magnet produces a very high conversion efficiency.