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-inch, 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 Black (GP218-sw-BK) or white (GP218-sw-WT) texture coat
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) CP218-0 Wood caster pallet without cover
CP218-1 Wood caster pallet plus soft cover
CVR-GP218 Soft cover for one GP218-sw

Specifications are subject to change without notice.