Dual 18-inch Subwoofer


  • Very high acoustic output capability: 140.5 dB SPL (1m) peak
  • Tight musical "punch" combined with low-frequency extension down to 27.4 Hz
  • Elegant transport and handling features including an optional transport dolly plus soft cover and four thoughtfully placed handles
  • Premium-grade, long-excursion, high-power woofers with 4", fiberglass voice coils, double layer spiders and triple-roll surrounds
  • 18 mm birch ply enclosure with independent, dual chambers and extensive internal bracing for rigidity and solid, accurate reproduction
  • Finish available in black (GP218-sw-BK) or white (GP218-sw-WH).
  • Cinema-version available for surround LFE
Configuration 2 × 18" vented subwoofer
Transducers 8 ohm, 18" woofer with a 4" voice coil, ceramic magnet assembly
Frequency Response (±3 dB) 31.4 Hz to 240 Hz (without processing)
Frequency Range (-10 dB) 27.4 Hz to 1.2 kHz (without processing)
Nominal Impedance 4 ohms
Continuous Power Capacity 1700 W
Recommended Power 3000 to 4000 W
Sensitivity (1 W at 1 m) 101.5 dB
Maximum Output - Continuous / Peak (SPL at 1 m) 134.5 dB / 140.5 dB
Cabinet Type Vented, rectangular enclosure
Enclosure Material Baltic birch plywood / 18 mm
Finish Finish available in black (GP218-sw-BK) or white (GP218-sw-WH)
Grille 14 gauge powder coated steel
Connectors Two NL4 in parallel
Pin Outs  
Attachment Points Sixteen (16) threaded M10 inserts
Weight 191 lb / 86.6 kg Net
209 lb / 94.8 kg Shipping
Dimensions (HWD) inches 20 x 47.17 x 30
Dimensions (HWD) mm 508 x 1198 x 762
Accessories Available (optional) CRT-218-0 Wood cart 
All specifications are subject to change without notice.