Eminence Sigmapro-18a-2 18" Pro Woofer (sigmapro18a2)

Usually ships in 2-3 business days. In stock at our NJ warehouse.
Calculated at Checkout
Stock Update:
10/04/2022 06:44:05 PM PST
Stock Update:
10/04/2022 06:44:05 PM PST


This item is brand-new, factory sealed.

Nominal Basket Diameter 18-in, 457 mm
* Nominal Impedance* 8 Ohms
* Power Rating*
* Program Power 1300 W
* Watts 650 W
* Resonance 28 Hz
* Usable Frequency Range 41 Hz - 2.4 kHz
* Sensitivity* 99 dB
* Magnet Weight 120 oz.
* Gap Height 0.37-in, 9.5 mm
* Voice Coil Diameter 3-in, 76 mm
* Resonant Frequency (fs) 28 Hz
* DC Resistance (Re) 6.29 O
* Coil Inductance (Le) 1.9m H
* Mechanical Q (Qms) 8.28
* Electromagnetic Q (Qes) 0.3
* Total Q (Qts) 0.29
* Compliance Equivalent Volume (Vas) 441.2 liters / 15.58 cu.ft.
* Peak Diaphragm Displacement Volume (Vd) 695 cc
* Mechanical Compliance of Suspension (Cms) 0.24 mm/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

* Recommended Enclosure Volume
* Sealed N/a
* Vented 93-212 liters / 3.3-7.5 cu.ft.
* Driver Volume Displaced 0.234 cu.ft. / 6.62 liters
* Overall Diameter 18-in, 457.2 mm
* Baffle Hole Diameter 16.56-in, 420.6 mm
* Front Sealing Gasket Yes
* Rear Sealing Gasket Yes
* Mounting Holes Diameter 0.28-in, 7.1mm
* Mounting Holes B.C.D. 17.25-in, 438.2mm
* Depth 8.15-in, 207 mm
* Net Weight 24.5 lbs, 11.11 kg
* Shipping Weight 28.1 lbs, 12.75 kgs
* 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


Country of Origin:   
United States



Physical Characteristics
Product Material
Speaker Depth8.15"
Weight (Approximate)24.50 lb
Speaker Diameter18"
Limited Warranty7 Year
General Information
Brand NameEminence
Manufacturer Website Addresshttp://www.eminence.com
Marketing InformationEach 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. We coat each chassis and all metal components with an epoxy-acrylic finish using our in-house e-coat process. We can control the thickness of that coating to within 0.001"; critical when working with close tolerance transducer motor designs. We then add front and rear sealing gaskets on each model to accommodate front or rear loading.
Product TypeSpeaker
Product NameProfessional SIGMA PRO 18A-2 Speaker
ManufacturerEminence Speaker, LLC
Manufacturer Part Numbersigmapro-18a-2
Product ModelSIGMA PRO 18A-2
Product LineProfessional
Technical Information
PMPO Output Power1300 W
Minimum Frequency Response41 Hz
Maximum Frequency Response2.40 kHz
Woofer Driver MaterialPaper
Sensitivity99 dB
Woofer Driver Size18"
Impedance8 Ohm
RMS Output Power650 W

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Warranty Information

All Items are Brand New, Factory Sealed and come with a standard warranty. [Read our policies]
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Eminence Sigmapro-18a-2 18" Pro Woofer (sigmapro18a2)