Datasheet

SIGMA PRO 18 - 2
For all high power bass applications
Nominal Basket Diameter
Impedance
Power Rating
Resonance
Usable Frequency Range
Sensitivity
Magnet Weight
Gap Height
Voice Coil Diameter
Mounting Information
Recommended Enclosure Volume
(vented)
Overall Diameter
Baffle Hole Diameter
Front Sealing Gasket
Rear Sealing Gasket
Mounting Holes Diameter
Mounting Holes B.C.D.
Depth
Shipping Weight
Thiele-Small Parameters
Resonant Frequency (fs)
Impedance (Re)
Coil Inductance (Le)
Electromagnetic Q (Qes)
Mechanical Q (Qms)
Total Q (Qts)
Compliance Equivalent Volume (Vas)
Peak Diaphragm Displacement Volume (Vd)
Mechanical Compliance of Suspension (Cms)
BL Product (BL)
Diaphragm Mass inc. Airload (Mms)
Equiv. Resistance of Mechanical
Suspension Loss (Rms)
Efficiency Bandwidth Product (EBP)
Voice Coil Overhang (Xmax)
Surface Area of Cone (Sd)
Impedance at Resonance (Zmax)
Maximum Linear Excursion (Xmech)
18", 457.2mm
8 ohms
650Wrms
28Hz
25Hz - 2.5kHz
see chart on web
120oz.*
0.375", 9.52mm
3.0", 76.2mm
106 - 177 liters
3.75 - 6.25 cu. ft.
18", 457.2mm
16.56", 420mm
fitted as standard
fitted as standard
0.25", 6.4mm
17.25", 438.2mm
8.15", 207mm
27.2lbs., 12.4 kg.
28Hz
6.29 ohms
1.90mH
0.30
8.28
0.29
441.2 liters
15.58 cu. ft.
688cc
0.24mm/N
22.1 T-M
130 grams
2.81N*sec/M
95
6.0mm
1140.1cm
2
180 ohms
36.45mm
_______________
Materials of Construction
● Kapton coil former for increased rigidity and
thermal protection
● Polyamide-imide coated two-layer, 28ga., copper voice
coil for improved power-handling and durability
● Ferrite Magnet (*recently improved with a 120oz.
magnet)
● Vented and extended core for increased power- handling
● Die-cast aluminum basket for rigidity
● Paper cone
● Cloth cone edge
● Solid composition paper dust cap
Eminence Speaker LLC
P. O. Box 360
Eminence, Kentucky 40019
USA
502.845.5622 phone
502.845.5653 fax
[e-mail]
www.eminence.com
FORM 96153