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GM12-88N


The P. Audio ‘Golden Master’ GM12-88N is the intersection of advanced design and state of the art manufacturing. The GM12-88N is a 12 inch (305mm) low frequency transducer for high performance professional audio. The 3.5 inch (88.9mm) inside/outside wound voice coil is designed for superior reliability and excursion, featuring low weight, high temperature aluminium wire and extended winding length. The low-weight neodymium magnetics maximize the coil’s strengths by providing extra strong magnetic flux across its whole range of movement. This keeps coil motion faithful to the audio signal without distorting. Aluminium ‘demodulation’ rings negate inductance effects in the motor, further improving the fidelity of coil movement. The neodymium magnet structure cooperates with a carefully optimized venting system on the bottom of the sleek Golden Master chassis to control airflow around the voice coil. This cools the durable design to further levels of reliability without losing sensitivity – the GM12-88N is rated at 2800 W peak power handling/700 W AES continuous power handling with nominal sensitivity of 97 dB. Linear and symmetrical stiffness behavior of the suspension compliments linear coil motion.

The GM12-88N’s large diameter spider is a durable silicone laminate design that provides symmetrical displacement and reliable voice coil positioning even after hours at high power levels. The cone features a proprietary doubleroll cloth surround. The perfect match of material and geometry mean ultra-low distortion of cone movement and ultra-low distortion of sound. Coating keeps the cone rigid and waterproof during operation, while low moving mass has been optimized for high performance 12” two-way designs. The ideal application for the GM12-88N is in very high performance sound reinforcement and large format public address systems. It is ideal for use in a well-tuned vented enclosure in a range of configurations – general purpose sound reinforcement systems, mid-bass applications and floor monitors. Performance is optimized when using a high pass 4th order Butterworth filter tuned near the enclosure vent frequency. The GM12-88N offers a 60-2500Hz useable bandwidth, though the actual crossover frequency will be determined by the driver and horn combination in the user’s system.

GENERAL SPECIFICATIONS

  Nominal diameter   305 mm / 12 in
  Peak Power   2800 W
  AES Power   700 W
  Nominal impedance   8Ω
  Sensitivity (1W/1m)   97 dB
  Frequency range   60 - 2500 Hz
  Chassis type   Cast aluminum
  Magnet type   Neodymium
  Magnet weight   0.38 kg / 13.3 oz
  Voice coil diameter   88.9 mm / 3.5 in
  Coil material   Round Aluminium Wire
  Former material   Glass fiber
  Cone material   Paper
  Surround material   Cloth
  Suspension   Silicone Impregnated Spider
  Xmax   -2 mm / -0.08 in
  Gap depth   19 mm / 0.75 in
  Voice coil
  winding width
  15 mm / 0.59 in
  Unit weight   6.5 kg / 14.3 lb
  Shipping weight   7.4 kg / 16.3 lb
  Packaging dimension
  WxDxH
  355x355x190 mm
  14x14x7.5 in

FEATURES

  • 3.5” Voice Coil
  • 2800 Watts Peak Power Handling
  • 97 dB Sensitivity
  • FEM Designed Neodymium Magnetics
  • Precision Round Wire Inside/Outside Coil Design
  • Triple Aluminium Demodulation Rings

SMALL SIGNAL PARAMETERS

  Fs   63 Hz
  Re   5.7 Ohm
  Qms   3.61
  Qes   0.54
  Qts   0.47
  Bl   17.78 Tm
  Mms   75.20 g / 2.65 oz
  Mmd   68.16 g / 2.41 oz
  Vas   33.5 lt / 1.18 cu.ft3
  Sd   531 cm2
  Le   0.50 mH
  Cms   8.5e - 05 m/N
  Rms   8.3 Ns/m

GM12-88N


The P. Audio ‘Golden Master’ GM12-88N is the intersection of advanced design and state of the art manufacturing. The GM12-88N is a 12 inch (305mm) low frequency transducer for high performance professional audio. The 3.5 inch (88.9mm) inside/outside wound voice coil is designed for superior reliability and excursion, featuring low weight, high temperature aluminium wire and extended winding length. The low-weight neodymium magnetics maximize the coil’s strengths by providing extra strong magnetic flux across its whole range of movement. This keeps coil motion faithful to the audio signal without distorting. Aluminium ‘demodulation’ rings negate inductance effects in the motor, further improving the fidelity of coil movement. The neodymium magnet structure cooperates with a carefully optimized venting system on the bottom of the sleek Golden Master chassis to control airflow around the voice coil. This cools the durable design to further levels of reliability without losing sensitivity – the GM12-88N is rated at 2800 W peak power handling/700 W AES continuous power handling with nominal sensitivity of 97 dB. Linear and symmetrical stiffness behavior of the suspension compliments linear coil motion.

The GM12-88N’s large diameter spider is a durable silicone laminate design that provides symmetrical displacement and reliable voice coil positioning even after hours at high power levels. The cone features a proprietary doubleroll cloth surround. The perfect match of material and geometry mean ultra-low distortion of cone movement and ultra-low distortion of sound. Coating keeps the cone rigid and waterproof during operation, while low moving mass has been optimized for high performance 12” two-way designs. The ideal application for the GM12-88N is in very high performance sound reinforcement and large format public address systems. It is ideal for use in a well-tuned vented enclosure in a range of configurations – general purpose sound reinforcement systems, mid-bass applications and floor monitors. Performance is optimized when using a high pass 4th order Butterworth filter tuned near the enclosure vent frequency. The GM12-88N offers a 60-2500Hz useable bandwidth, though the actual crossover frequency will be determined by the driver and horn combination in the user’s system.