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Eminence Sigma Pro 18A-2 18" Pro Audio Woofer

Recommended for professional audio as a woofer in vented enclosures. 18", 8 ohms, 650W.


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MSRP: Old Price $249.99 Discounted Price $199.99 Save : $50.00 (20%)
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MSRP: Old Price $249.99 Discounted Price $199.99 Save : $50.00 (20%)
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Each Eminence Professional model can be identified by its cast aluminum Eminence chassis that is lightweight and strong. Aluminum does not conduct the magnetic field out of the gap, thereby making the motor strength higher and the stray magnetic field lower.

Eminence then coats each chassis and all metal components with an epoxy-acrylic finish using its in-house, e-coating process. They then control the thickness of that coating to within 0.001”; critical when working with close tolerance transducer motor designs, then add front and rear sealing gaskets on each model to accommodate front or rear loading.

Each product comes with a Seven Year Warranty against manufacturer’s defects.

  • Nominal Basket Diameter: 18", 457 mm
  • Nominal Impedance: 8 Ω
  • Power Rating Watts: 650 W
  • Music Program: 1300 W
  • Resonance: 28 Hz
  • Usable Frequency Range: 41 Hz - 2.4 kHz
  • Sensitivity: 99 dB
  • Magnet Weight: 120 oz.
  • Gap Height: 0.375", 9.5 mm
  • Voice Coil Diameter: 3", 76 mm
  • 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

Things You Will Get:

    Sigma Pro 18A-2 18" Woofer


by PowerReviews
Series Professional
Model Sigma Pro
Weight 24.5 lbs
Dimensions Overall Diameter: 18" / Baffle Hole Diameter: 16.56"
Warranty Info:

The manufacturer's warranty covers parts for seven years and labor for seven years from date of purchase. The warranty excludes damage from misuse, abuse, and contains other exclusions.