Speaker - Eminence® Pro, 18", Sigma Pro-18A, 650W

Eminence
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Speaker - Eminence® Pro, 18", Sigma Pro-18A, 650W

$199.99
Note: special order items require additional lead time. See our page on special order items.

Special Order Item

Professional Series 18" speaker. Recommended for professional audio as a woofer in vented enclosures

SKU:
P-A-SIGMAPRO-18A-X
Item ID:
010615
Brand:
EminenceProfessional
Size:
Part Numbers
ImpedanceOur Part NumberUPC/EANEminence Part Number
4 ΩP-A-SIGMAPRO18-4876358002603 SIGMA PRO 18A-2
8 ΩP-A-SIGMAPRO-18A-8876358000395 SIGMA PRO 18A-2
Product Measurements by Type
Baffle Hole Diameter16.56 in.
Basket MaterialDie-cast aluminum basket
Coil Constructioncopper voice coil
Coil FormerPolyimide former
Coil Inductance (le)4 Ω versionP-A-SIGMAPRO18-40.85 mH
8 Ω versionP-A-SIGMAPRO-18A-81.9 mH
Cone CompositionPaper cone
Cone Edge CompositionCloth cone edge
Core DetailsVented and extended core
D.C. Resistance (Re) 4 Ω versionP-A-SIGMAPRO18-43.35 Ω
8 Ω versionP-A-SIGMAPRO-18A-86.29 Ω
Depth8.15 in.
Driver Volume Displaced6.62 liters
Dust Cap CompositionSolid composition paper dust cap
Efficiency Bandwidth Product (ebp)4 Ω versionP-A-SIGMAPRO18-4107
8 Ω versionP-A-SIGMAPRO-18A-893
Electrical Q Factor (Qes)0.3
Equivalent Acoustic Volume (VAS)4 Ω versionP-A-SIGMAPRO18-4360.84 liters
8 Ω versionP-A-SIGMAPRO-18A-8441.2 liters
Force Factor (BxL)4 Ω versionP-A-SIGMAPRO18-416.54 Wb/m
8 Ω versionP-A-SIGMAPRO-18A-822.1 Wb/m
Front Sealing GasketYes
Gap Height9.5 mm
Linear Displacement, maximum (XMAX)4 Ω versionP-A-SIGMAPRO18-47 mm
8 Ω versionP-A-SIGMAPRO-18A-86.1 mm
Magnet CompositionFerrite
Magnet Weight120 oz.
Mechanical Compliance (CMS)4 Ω versionP-A-SIGMAPRO18-40.2 mm/N
8 Ω versionP-A-SIGMAPRO-18A-80.24 mm/N
Mechanical Limit, maximum (XLIM)18 mm
Mechanical Moving Mass (MMS)4 Ω versionP-A-SIGMAPRO18-4121 g
8 Ω versionP-A-SIGMAPRO-18A-8130 g
Mechanical Q Factor (QMS)4 Ω versionP-A-SIGMAPRO18-414.79
8 Ω versionP-A-SIGMAPRO-18A-88.28
Mounting Hole Bolt Circle Diameter438.2 mm
Mounting Hole Diameter7.1 mm
Nominal Basket Diameter18 in.
Nominal Impedance4 Ω versionP-A-SIGMAPRO18-44 Ω
8 Ω versionP-A-SIGMAPRO-18A-88 Ω
Overall Diameter457.2 mm
Peak Diaphragm Displacement Volume (vd)695 cm3
Power Rating4 Ω versionP-A-SIGMAPRO18-4700 W
8 Ω versionP-A-SIGMAPRO-18A-8650 W
Program Power Rating8 Ω versionP-A-SIGMAPRO-18A-81,300 W
Rear Sealing GasketYes
Recommended Enclosure Volume, vented4 Ω versionP-A-SIGMAPRO18-484.95 liters - 212.38 liters
8 Ω versionP-A-SIGMAPRO-18A-893 liters - 212 liters
Resonance8 Ω versionP-A-SIGMAPRO-18A-828 Hz
Resonance Frequency (ƒS)4 Ω versionP-A-SIGMAPRO18-432 Hz
8 Ω versionP-A-SIGMAPRO-18A-828 Hz
Sensitivity4 Ω versionP-A-SIGMAPRO18-497.6 dB
8 Ω versionP-A-SIGMAPRO-18A-899 dB
Surface Area Of Cone (sd)1140 cm2
Total Q Factor (QTS)0.29
Usable Frequency Range4 Ω versionP-A-SIGMAPRO18-432 Hz - 2 kHz
8 Ω versionP-A-SIGMAPRO-18A-841 Hz - 2.4 kHz
Voice Coil Diameter3 in.
Packaging Information
Packaging Dimensions4 Ω versionP-A-SIGMAPRO18-419.25 in. × 19.25 in. × 9 in.
8 Ω versionP-A-SIGMAPRO-18A-819 in. × 19 in. × 8.125 in.
Weight (Packaging)28.1 lbs.
Product Measurements by Item
P-A-SIGMAPRO18-4 - 4 Ω versionBaffle Hole Diameter16.56 in.
Basket MaterialDie-cast aluminum basket
Coil Constructioncopper voice coil
Coil FormerPolyimide former
Coil Inductance (le)0.85 mH
Cone CompositionPaper cone
Cone Edge CompositionCloth cone edge
Core DetailsVented and extended core
D.C. Resistance (Re) 3.35 Ω
Depth8.15 in.
Driver Volume Displaced6.62 liters
Dust Cap CompositionSolid composition paper dust cap
Efficiency Bandwidth Product (ebp)107
Electrical Q Factor (Qes)0.3
Equivalent Acoustic Volume (VAS)360.84 liters
Force Factor (BxL)16.54 Wb/m
Front Sealing GasketYes
Gap Height9.5 mm
Linear Displacement, maximum (XMAX)7 mm
Magnet CompositionFerrite
Magnet Weight120 oz.
Mechanical Compliance (CMS)0.2 mm/N
Mechanical Limit, maximum (XLIM)18 mm
Mechanical Moving Mass (MMS)121 g
Mechanical Q Factor (QMS)14.79
Mounting Hole Bolt Circle Diameter438.2 mm
Mounting Hole Diameter7.1 mm
Nominal Basket Diameter18 in.
Nominal Impedance4 Ω
Overall Diameter457.2 mm
Peak Diaphragm Displacement Volume (vd)695 cm3
Power Rating700 W
Rear Sealing GasketYes
Recommended Enclosure Volume, vented84.95 liters - 212.38 liters
Resonance Frequency (ƒS)32 Hz
Sensitivity97.6 dB
Surface Area Of Cone (sd)1140 cm2
Total Q Factor (QTS)0.29
Usable Frequency Range32 Hz - 2 kHz
Voice Coil Diameter3 in.
P-A-SIGMAPRO-18A-8 - 8 Ω versionBaffle Hole Diameter16.56 in.
Basket MaterialDie-cast aluminum basket
Coil Constructioncopper voice coil
Coil FormerPolyimide former
Coil Inductance (le)1.9 mH
Cone CompositionPaper cone
Cone Edge CompositionCloth cone edge
Core DetailsVented and extended core
D.C. Resistance (Re) 6.29 Ω
Depth8.15 in.
Driver Volume Displaced6.62 liters
Dust Cap CompositionSolid composition paper dust cap
Efficiency Bandwidth Product (ebp)93
Electrical Q Factor (Qes)0.3
Equivalent Acoustic Volume (VAS)441.2 liters
Force Factor (BxL)22.1 Wb/m
Front Sealing GasketYes
Gap Height9.5 mm
Linear Displacement, maximum (XMAX)6.1 mm
Magnet CompositionFerrite
Magnet Weight120 oz.
Mechanical Compliance (CMS)0.24 mm/N
Mechanical Limit, maximum (XLIM)18 mm
Mechanical Moving Mass (MMS)130 g
Mechanical Q Factor (QMS)8.28
Mounting Hole Bolt Circle Diameter438.2 mm
Mounting Hole Diameter7.1 mm
Nominal Basket Diameter18 in.
Nominal Impedance8 Ω
Overall Diameter457.2 mm
Peak Diaphragm Displacement Volume (vd)695 cm3
Power Rating650 W
Program Power Rating1,300 W
Rear Sealing GasketYes
Recommended Enclosure Volume, vented93 liters - 212 liters
Resonance28 Hz
Resonance Frequency (ƒS)28 Hz
Sensitivity99 dB
Surface Area Of Cone (sd)1140 cm2
Total Q Factor (QTS)0.29
Usable Frequency Range41 Hz - 2.4 kHz
Voice Coil Diameter3 in.

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