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JAM Systems SB118-33 Empty Subwoofer Cabinet for 1 x 18" Driver
Built for serious bass performance, this 18" subwoofer cabinet combines rugged construction with precise acoustic tuning. Crafted from 18mm high-grade plywood and finished in an extra-tough PolyUrea coating, it’s engineered to withstand years of hard touring and heavy use. Measuring 700mm high × 580mm wide × 580mm deep, the cabinet’s footprint has been carefully chosen — the 580mm width is the magic dimension that allows three cabinets to fit perfectly across the back of a standard panel van, making transport simple and efficient. With a 33Hz tuning frequency, it delivers deep, heavy bass that pairs beautifully with subwoofer drivers around 32–35Hz Fs, giving you extended low-end power with excellent definition. Designed for practicality as well as performance, every detail is built with the professional user in mind.
Key Features
Key Features
- 18mm high-grade plywood construction
- Custom hex steel grille with acoustic foam backing
- Recessed cage-nut fittings for easy grille alignment and fitting
- M20 screw-in top hat mount for satellite speakers
- Heavy-duty metal bar handles on each side
- Dual recessed rear connector dish with 2 × Neutrik NL4MP (pre-linked)
- Precision-cut interlocking feet/slots for secure stacking
- Port tuning at 33Hz for deep, heavy bass
- Pre-drilled and T-nutted for 4 × standard castors (3151 series) ** Wheels not included - available for purchase separately
- All cabinet fixings use T-nuts and machine screws (no self-tappers)
- Scratchproof PolyUrea finish for professional durability
| Parameter | Specification |
|---|---|
| External Dimensions | 700mm (H) × 580mm (W) × 580mm (D) |
| Internal Dimensions | 664mm (H) × 544mm (W) × 480mm (D) |
| Total Internal Volume | 173 litres |
| Port Dimensions | 65mm (H) × 544mm (W) × 330mm (D) (2 × 18mm braces) |
| Port Air Volume | ~10.9 litres |
| Total Volume (port + panels) | ~14.9 litres |
| Effective Internal Volume (net) | ~158 litres |
| Tuning Frequency (Fb) | 33Hz |
| Front Baffle Cutout Diameter | 423mm |
| Bolt Circle Diameter (BCD) | 440mm |
| Drivers for heavy sub bass (Dance Music, etc) | B&C 18TBW100, Faital Pro 18XL1600, RCF LF18X401, Lavoce SAF184.03 |
| Drivers for punchy, precise bass (Live Bands) | B&C 18TBX100, Beyma 18Lex1200Fe, Fane Colossus Prime 18XS |
| Recommended Driver Type | 18" subwoofer, Fs 32–35Hz, Qts 0.34 -0.39 |
| Weight (incl. grill, handles) | 30.3kg |
| Carton Dimensions | 800mm (H) x 680mm (W) x 680mm (D) |
| Shipping Weight | 35.3kg |
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