Eminence Sigma Pro 18A-2 18" Cast Frame Speaker

$199.99
PA SKU # EMN SIGMAPRO18A MFR # SIGMA PRO-18A UPC # 876358000395
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  • 18" Cast Frame Driver, 8 Ohm, 650 Watt

18" Cast Frame Driver, 8 Ohm, 650 Watt

The Eminence Sigma Pro-18A-2 18" cast frame speaker is recommended for professional audio as a woofer or subwoofer in vented enclosures. It has been engineered for durability as well as exceptional sound quality, and will serve well when loaded into high-output live sound or music playback systems. Made in the USA. 7-year manufacturer's warranty!
  • Copper voice coil on polyimide former
  • Die-cast aluminum basket
  • Vented and extended pole piece
  • Paper cone with cloth cone edge
  • Great replacement for the Dayton Audio PF460-8 18" Cast Frame Driver 4" VC
  • SPECIFICATION
  • Nominal Basket Diameter: 18", 457.2mm
  • Nominal Impedance*: 8 ohms
  • Power Rating**
  • Watts: 650W
  • Music Program: 1300W
  • Resonance: 28Hz
  • Usable Frequency Range: 41Hz - 2.4kHz
  • Sensitivity***: 99dB
  • Magnet Weight: 120 oz.
  • Gap Height: 0.37", 9.53mm
  • Voice Coil Diameter: 3", 76.2mm
  • 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): 441.2 liters / 15.6 cu.ft.
  • 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): 6.1mm
  • Surface Area of Cone (Sd): 1140 cm2
  • Maximum Mechanical Limit (Xlim): 18mm
  • MOUNTING INFORMATION
  • Recommended Enclosure Volume
  • Sealed: N/a
  • Vented: 93-212 liters / 3.3-7.5 cu.ft.
  • Driver Volume Displaced: 403.9 cu.in. / 6.62 liters
  • Overall Diameter: 18", 457.2mm
  • Baffle Hole Diameter: 16.56", 420.5mm
  • Front Sealing Gasket: Fitted as standard
  • Rear Sealing Gasket: Fitted as standard
  • Mounting Holes Diameter: 0.28", 7.1mm
  • Mounting Holes B.C.D.: 17.25", 438.2mm
  • Depth: 8.15", 207mm
  • 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
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