Description
When a subwoofer cabinet in your rig needs a rebuild, the Eminence Sigma Pro 18A-2 gives you a direct path back to full output without redesigning the box. This 18″ driver is purpose-built for vented enclosures, making it a natural swap for touring and installed PA bass bins that were designed around a similar Thiele-Small profile.
- 650W continuous power handling, 1300W program rating for headroom under real-world peaks
- 8 Ohm nominal impedance for straightforward integration into existing subwoofer wiring schemes
- 99 dB sensitivity means less amplifier power needed to hit rider-level SPL
- Usable range of 41 Hz – 2.4 kHz, with resonance at 28 Hz for deep, controlled low end
- Recommended vented enclosure volume of 93-212 liters (3.3-7.5 cu.ft.)
- Die-cast aluminum basket and 3″ copper voice coil on a polyimide former for thermal stability under sustained SPL
- Front and rear sealing gaskets included for airtight cabinet mounting
- Net weight 24.5 lbs, overall diameter 18″, depth 8.15″
For crews scaling a subwoofer array or maintaining a fleet of matched bass cabinets, this driver’s consistent Thiele-Small parameters make it a dependable choice for keeping multiple boxes sounding uniform across a rig. Whether you’re refreshing a single wedge or standardizing a stack, the Sigma Pro 18A-2 is engineered to hold up night after night on stage or on the road.
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