The TRx3218 is our most powerful Dual 18-inch Subwoofer system. The high power, 18-inch woofers features a 4-inch voice coil with 9.75mm of excursion and low temperature high peak power capacity. The box is designed with eight deep large corner located ports producing a very strong structure, and coherent sub frequency output vertically and horizontally. This provides the idea low frequency coupling in multi box clusters, both in the horizontal and vertical positions. The added strength and rigidity of the corner ports puts all the force of the speaker out the front and into the room, and not wasted on vibrating the walls.

The TRx3218 features foot locating holes on top for stacking another TRx3218 and for stacking up to 4 TRx3210 line array elements without hardware. Idea for putting several TRx3210s out front on the subs for front fill. There is also a top centered pole mount for suspending a TRx2115. The enclosure is constructed of CNC machined 13-Ply Premium Russian Baltic Birch with heavy gauge steel powder coated front grills. The crossover includes two 4 pin twist lock high current connectors mounted on FR4 double sided circuit boards for solid construction and durability. The back is pre drilled, has T-Nuts, and screws ready for our CTS44, 4inch low noise swivel cast set.

Applications include:

  • Medium to Large Club System
  • Large DJ system
  • Outdoor events
  • Medium to Large House of Worship


  • System Type: Dual 18-inch Sub, bass-reflex
  • Frequency Response: 32 Hz – 1.5K Hz (-10DB), 38 Hz – 1K Hz (-3 dB)
  • Coverage Pattern: omni— Cardiod in 8x Arrays
  • Crossover: none internal
  • Crossover Frequency: recommended 80-90 Hz
  • Power Full Range: 2000w Continuous /4000w Program / 8000w Peak
  • Recommended Amplifier Power: 3800w minimum
  • Sensitivity (1w @ 1m): 102dB
  • Maximum SPL: 135dB Cont/ 141dB Peak
  • LF Driver: Dual 18-inch Cast Frame 4-inch VC
  • Nominal Impedance full range: 4 ohms
  • Enclosure: 13-Ply Premium Russian Baltic Birch
  • Suspension/Mounting: 1 3/8 Pole Mount Cup
  • Finish: Black DuraTex™
  • Transport: 4 Recessed Handles
  • Grill: Black powder coated steel, Acoustically Transparent Foam Backing
  • Connectors: Two 4-pin twist lock connectors
  • Dimensions: 23" high x 41.5" wide x 28.5" deep (585 mm x 1054 mm x 724 mm) Net Wt: 140 lb (63.6 kg)

Made in San Diego, California