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Powered 4 x 18" Subwoofer Speaker, Touring / Road Model


Our Price: $4,888.00
List Price: $5,750.00
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The PQUARTZ-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 PQUARTZ-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. The PQUARTZ-R is powered by two Minima One amplifiers.

The Minima One is available in most Bag End loudspeaker models providing an on board powered system option. Each powered loudspeakers system is individually adjusted for the correct maximum power and protection settings insuring a reliable high performance powered loudspeaker solution.

The Minima One amplifier is both a hi fidelity and a high efficiency amplifier. The Minima One is more than 80% efficient providing more power to the loudspeaker and creating less heat in the amplifier. Incorporating patented technology, the comparison circuit of the Minima One corrects each individual cycle to drive error to zero at the end of every cycle. On average every 4 microseconds the one cycle modulator transforms and amplifies the input signal into the ideal natural pulse width modulation. Switching at 250kHz with the single cycle error correction insures extremely low distortion and high reliability.

The power factor corrected AC power input automatically and continuously adapts to any voltage between 88 and 275 volts. The Minima one is convenient to power and stable to use on any power grid in the world.


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

Speaker Specifications

  • 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: 8 - Recessed handles, 4 - 3 1/2" Casters, 2 - 35 mm Pole mount adapters, 16 - Machined aluminum speaker mounting clamps, 4 - UHMW polyethylene feet
  • 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: 18 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: 249 lbs.
  • Shipping Dimensions: 45" x 35" x 39"
  • Shipping Weight: 289 lbs.

Amplifier Specifications

  • Rated power: 1000 watts at 4 Ohm load, 500 watts at 8 Ohm load
  • Frequency response: 20/20 kHz +/- 0.5 dB
  • THD + Noise: 0.2% worst case, 30 kHz measurement BW 0.1% 1kHz 100W, 30 kHz measurement BW
  • Damping ratio: 450-100 Hz, 8 Ohm load
  • Dynamic range: 110 dB
  • AC Input Voltage: 88 Volts Minimum ,275 Volts Maximum

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