Eminence SIGMA PRO 18-A2 PA Bass Speaker (1300 Watts, 18")

Push some serious air with this 18" subwoofer driver. With a 99 dB sensitivity rating, this rugged replacement speaker delivers efficient low-end power.

The Eminence Sigma Pro 18A-2 is a high power (650-watt continuous EIA, 1300-watt Music Program), 18" sub bass/sub-woofer speaker designed for vented cabinets. The Sigma Pro-18A-2 is very efficient with high sensitivity (99dB) and delivers floor shaking sound levels throughout its operating range (41Hz-2.4kHz) making it an exceptional choice for DJ and front of house sound systems. Features include a rugged cast aluminum frame and vented core for efficient heat dissipation, and a huge 120-ounce magnet and 8 Ohms rating plus a seven year warranty against factory defects.

Take an in-depth tour of the Eminence speaker factory:
WARNING: Cancer and Reproductive Harm - www.p65Warnings.ca.gov.

- Nominal Basket Diameter: 18", 457.2 mm
- Nominal Impedance*: 8 ohms
- Power Rating
- Watts: 650 watts
- Music Program: 1300 watts
- Resonance: 28Hz
- Usable Frequency Range: 41Hz - 2.4kHz
- Sensitivity: 99dB
- Magnet Weight: 120 oz.
- Gap Height: 0.37", 9.53 mm
- Voice Coil Diameter: 3", 76.2 mm
- THIELE & SMALL PARAMETERS
- Resonant Frequency (fs): 28Hz
- DC Resistance (Re): 6.29
- Coil Inductance (Le): 1.9mH
- Mechanical Q (Qms): 8.28
- Electromagnetic Q (Qes): 0.3
- Total Q (Qts): 0.29
- Compliance Equivalent Volume (Vas): 15.6-cubic feet
- Peak Diaphragm Displacement Volume (Vd): 695cc
- Mechanical Compliance of Suspension (Cms): 0.24mm/N
- BL Product (BL): 22.1 T-M
- Diaphragm Mass Inc. Airload (MMs): 130 grams
- Efficiency Bandwidth Product (EBP): 93
- Maximum Linear Excursion (Xmax): 6.1 mm
- Surface Area of Cone (Sd): 1140 cm2
- Maximum Mechanical Limit (Xlim): 18 mm
- MOUNTING INFORMATION
- Recommended Enclosure Volume
- Sealed: N/a
- Vented: 93-212 liters / 3.3 - 7.5-cubic feet
- Driver Volume Displaced: 403.9-cubic inches
- Overall Diameter: 18", 457.2 mm
- Baffle Hole Diameter: 16.56", 420.5 mm
- Front Sealing Gasket: Fitted as standard
- Rear Sealing Gasket: Fitted as standard
- Mounting Holes Diameter: 0.28", 7.1 mm
- Mounting Holes B.C.D.: 17.25", 438.2 mm
- Depth: 8.15", 207 mm
- Net Weight: 24.5 lbs, 11.1 kg
- Shipping Weight: 28.1 lbs, 12.8 kgs
- MATERIALS OF CONSTRUCTION
- Coil Construction: Copper voice coil
- Coil Former: Polyimide former
- Magnet Composition: Ferrite magnet
- Core Details: Vented and extended core
- Basket Materials: Die-cast aluminum basket
- Cone Composition: Paper Cone
- Cone Edge Composition: Cloth cone edge
- Dust Cap Composition: Solid composition paper dust cap
Dimensions and Weight in Packaging
8 Ohms
Shipping Weight: 26 lbs
Shipping Dimensions: 20 x 19 x 9 in
Manufacturer Part Number (MPN): SIGMAPRO18A-2

For support or warranty questions, please contact the manufacturer:
Phone: 502-845-5622

Reviewers gave this product an overall rating of 5 out of 5 stars. (3 ratings)
Submitted August 20, 2013 by rodney m in beckley, WV
"very impressed"
Overall: 5 out of 5 stars
Verified Customer zZounds has verified that this reviewer made a purchase from us.
used a pair of these in a DIY cab, copy of EV T-18s. Wow, they punch!. the cab, by default has a natural roll off somewhere around 40-45 hz, leaving an open road to kick drum and bass freqs. broke them in at a 6 hour festival a few weeks ago, and these things took all 1200 watts/each i threw at them with ease. perfect for rock, country, pop bands without alot of sub bass to reproduce. will be buying more to add to the stack. ZZounds were wonderful as always!
Musical Background:
drummer, sound engineer over 25 years
Musical Style:
christian rock, P/W, metal
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8 Ohms

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