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 SPECIFICATIONS |
| Power Handling (RMS) |
650 Watts |
| Power Handling (max) |
1,300 Watts |
| Impedance |
8 ohms |
| Frequency Response |
41 to 2,400 Hz |
| Sensitivity |
99 dB 1W/1m |
| Voice Coil Diameter |
3" |
| Magnet Weight |
120 oz. |
| THIELE-SMALL PARAMETERS |
| Resonant Frequency (Fs) |
28 Hz |
| DC Resistance (Re) |
6.29 ohms |
| Voice Coil Inductance (Le) |
1.90 mH |
| Mechanical Q (Qms) |
8.28 |
| Electromagnetic Q (Qes) |
0.30 |
| Total Q (Qts) |
0.29 |
| Compliance Equivalent Volume (Vas) |
16.6 ft.³ |
| Mechanical Compliance of Suspension (Cms) |
0.24 mm/N |
| BL Product (BL) |
22.1 Tm |
| Diaphragm Mass Inc. Airload (Mms) |
130g |
| Maximum Linear Excursion (Xmax) |
6.1 mm |
| Surface Area of Cone (Sd) |
1140 cm² |
| MATERIALS OF CONSTRUCTION |
| Cone Material |
Paper |
| Surround Material |
Cloth |
| Voice Coil Wire Material |
Copper |
| Voice Coil Former |
Kapton® / Polyimide |
| Basket / Frame Material |
Cast Aluminum |
| Magnet Material |
Ferrite |
| MOUNTING INFORMATION |
| Overall Outside Diameter |
18.00" |
| Baffle Cutout Diameter |
16.56" |
| Depth |
8.15" |
| # Mounting Holes |
8 |
| OPTIMUM CABINET SIZE * |
| Sealed Volume |
1.87 ft.³ |
| Sealed F3 |
83 Hz |
| Vented Volume |
4.33 ft.³ |
| Vented F3 |
53 Hz |
| * Enclosure volume/F3s based on BassBox "optimum" calculations |
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| Eminence Sigma Pro-18A-2 18" Cast Frame Driver |
| Brand |
Eminence Speaker |
| Model |
Sigma Pro-18A-2 |
| Part Number |
290-427 |
| UPC |
876358000395 |
| Product Category |
Woofers, Subwoofers & Midrange Speakers |
| Product Rating |
(19 Reviews)
|
| Unit of Measure |
ea |
| Weight |
27.9000 |
