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

Eminence Speaker
Part #290-427

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

Eminence Speaker
Part #290-427  
Model: Sigma Pro-18A-2
Eminence's Sigma Pro-18A-2 18" cast frame speaker performs superbly in moderately-sized professional PA subwoofer loudspeaker systems.
Key Features
  • 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
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MSRP: $294.99
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Overview

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

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!

Product Details

BrandEminence Speaker
ModelSigma Pro-18A-2
Part Number290-427
UPC876358000395
Unit of MeasureEach
Weight27.9

Product Specifications

Nominal Diameter18"
Power Handling (RMS)650 Watts
Power Handling (MAX)1300 Watts
Impedance8Ω
Frequency Response41 to 2,400Hz
Sensitivity99dB 2.83V/1m
Voice Coil Diameter3"

Thiele-Small Parameters

Resonant Frequency (Fs)28Hz
DC Resistance (Re)6.29Ω
Voice Coil Inductance (Le)1.9mH
Mechanical Q (Qms)8.28
Electromagnetic Q (Qes)0.3
Total Q (Qts)0.29
Compliance Equivalent Volume (Vas)15.58ft³
Mechanical Compliance of Suspension (Cms)0.24mm/N
BL Product (BL)22.1T·m
Diaphragm Mass Inc. Airload (Mms)130g
Maximum Linear Excursion (Xmax)6.1mm
Surface Area of Cone (Sd)1140cm²

Materials of Construction

Cone MaterialPaper
Surround MaterialCloth
Voice Coil Wire MaterialCopper
Voice Coil FormerKapton® / Polyimide
Basket / Frame MaterialCast Aluminum
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter18"
Baffle Cutout Diameter16.56"
Depth8.15"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume2.5ft³
Sealed F376.9Hz
Vented Volume5ft³
Vented F339.5Hz

Specifications

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Manuals & Resources

California Prop 65

WARNING: Cancer and Reproductive Harm

www.P65Warnings.ca.gov