Enclosure Type: Bass Reflex
Driver Alignment: Subwoofer
Bass Type: Subwoofer
Crossover Type: DSP
Impedance: 8 Ohm
Sensitivity: 98 dB
Cutoff -3 dB: 30 Hz
Diaphragm Material: Paper
Build Complexity: Novice
Radiation Type: Monopole
Type of Use: Public Address
Placement: Outside
Bass Driver Size: 18 inch
Cost of Parts: $920



Driver Options

You can build this subwoofer with any of these 4 drivers

18LW1400 subwoofer key features:
- 4” interleaved sandwich voice coil (ISV)
- Double silicon spider (DSS)
- Double Demodulating Ring (DDR)
- 1000W AES power handling

18LW2400 subwoofer key features:
- 4” interleaved sandwich voice coil (ISV)
- Triple silicon spider (TSS)
- Double Demodulating Ring (DDR)
- 2400W AES power handling

18LW2500 woofer key features:
- 1600 W AES power handling
- 100 mm (4 In) Interleaved voice coil (ISV)
- Composite reinforced straight ribbed cone
- Ultra linear dual magnet motor design

18TLW3000 woofer key features:
- 1800 W AES power handling
- 100 mm (4 In) Tetracoil dual voice coil
- Ultra linear suspension behavior for excellent sound clarity
- Low noise forced air cooling design


  • The enclosure should be made of Baltic birch plywood (15mm thickness)
  • Bolts are M6x35mm (M6 T-Nuts recommended)
  • Handling, rigging and connectors are user’s choice
  • It’s recommended to  damp the cabinet interior well(a high density dampening material, such as Dacron or with other synthetic fibers, is required for good performance)
  • Examples in the images
Exploded View
Side View
Front View
Front Baffle
Eighteen Sound is a leading designer and manufacturer of high quality professional audio loudspeakers, developing state-of-the-art transducer technologies and using the most advanced production techniques, located in Reggio Emilia, Italy.
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