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Subwoofer Speaker, 4 x 18". Installation Model


Our Price: $3,383.00
List Price: $3,980.00
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The QUARTZ-I is a very high output concert INFRAâ„¢ subwoofer system designed to minimize the space required to obtain extremely high level and high fidelity Extended low frequency output. The QUARTZ-I provides perfectly flat response down to 8 Hertz when used in conjunction with the 8 Hertz Integrator or down to 18 Hertz when used with the INFRA-M Integrator.


  • Concert PA systems
  • Auditorium Reinforcement
  • Discotheque Subwoofer
  • Cinema Subwoofer


  • Enclosure: 18 mm 13-ply birch plywood
  • Low Frequency Transducers: 4 - 18" INFRA cone, 3" Voice coil, 120 oz. Magnet
  • Input Connectors: 2 - Connector plates with: Dual Banana and Neutrik Speakon Custom connector configurations available
  • Grille: 14 Gauge black powder coated perforated steel in an extruded aluminum frame with weather seal
  • Standard Hardware: 16 - Machined aluminum speaker mounting clamps
  • Optional Hardware: Rigging points
  • System Type: INFRA 4 - Sealed chambers (3 cu. ft.each)
  • Impedance: 4 Ohms each input
  • Crossover Network: Requires INFRA Integrator
  • Recommended Crossover Frequency: 80 Hz
  • Frequency Response: 20 Hz to 65 Hz +/-2 dB (2 pi Steradians, with 8 Hertz Integrator)
  • Sensitivity: 99 dB SPL @ 45 Hz (1W @ 1m)
  • Power Handling: 1600 W continuous program
  • Finish: Black textured paint
  • Dimensions: 40"h x 30"w x 31"d, Trapezoidal, 60 degree taper per side
  • Weight: 224 lbs.
  • Shipping Dimensions: 45" x 35" x 39"
  • Shipping Weight: 276 lbs.

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