SIGMA PRO 18A Professional Series Recommended for professional audio as a woofer in vented enclosures. SPECIFICATION Nominal Basket Diameter 18“, 457.2 mm Nominal Impedance 8 ohms Power Rating Watts 650 W / Music Program 1300 W Resonance 28 Hz Usable Frequency Range 41 Hz – 2.4 kHz Sensitivity 99 Magnet Weight 120 oz. Gap Height […]
Nominal Diameter 545 mm (21“)
Nominal Impedance 4 Ω
Rated Power AES 1000 W
Continuous Program Power 2000 W
Sensitivity @ 1W/1m 97.0 dB
Voice Coil Diameter 100 mm (4“)
Voice Coil Winding Depth 25 mm
Magnetic Gap Depth 17 mm
Flux Density 0.94 T
Magnet Weight 536 g
Net Weight 10.5 kg
Manual/Εγχειρίδιο
OMEGA PRO-18A Professional Series
Recommended for professional audio as a woofer in vented enclosures. Also ideal for horn loading and scoops.
Product type
Loudspeaker Chassis
Type
PA
Nominal Diameter
18 "
Nominal Diameter
457.2 mm
Voice Coil
4 "
Voice Coil
101.6 mm
Overall diameter
457.2 mm
Pitch Circle Diameter
438.2 mm
Cut- out Measurement
420.5 mm
Diameter of fixing holes
7.1 mm
Depth
207 mm
Nominal Impedance
8 Ohm(s)
Nominal Load Capacity
800 W
maximum rated load
1600 W
Sensitivity (1 W / 1 m)
97 dB
Frequency response
40 - 800 Hz
Voice Coil Material
copper
Magnet
Ferrite
Depth of the magnetic gap
9.53 mm
Thiele & Small Parameter
Fs (Resonance Frequency)
25 Hz
Re (DC resistance)
5.2 Ohm(s)
Qms (mechanical quality)
8.18
Le (inductance of the voice coil)
1.67 mH
Qes (electrical quality)
0.32
Qts (overall quality)
0.31
Vas (equivalent volume)
548.7
Mms (moving mass)
138 g
BL (power factor)
18.8 T/m
Xmax (maximum displacement)
4.8 mm
Cms (elasticity of the suspension)
0.29 mm/N
Sd (membrane area)
1159 cm²
Weight
12,14 kg
Nominal Specifications
Nominal Diameter 18“, 460 mm
Overall Diameter 18.11“, 460 mm
Bolt Circle Diameter 17.32“, 440 mm
Baffle Cutout Diameter 16.6“, 422 mm
Depth 9.09“, 231 mm
Flange and Gasket Thickness 0.55“, 14 mm
Electrical Specifications
Minimum Impedance 7.2 Ohm
Nominal Impedance 8 Ohm
Nominal Power Handling*** 1,600 W
Maximum Power Handling**** 3,200 W
Sensitivity (1W/1m) 98 dB
Frequency Range 30 - 1500 Hz
Voice Coil Diameter 4“, 100 mm
Winding Material Copper
Former Material Glass Fiber
Winding Depth 1.23“, 31.3 mm
Magnetic Gap Depth 0.61“, 15.5 mm
Flux Density 1.05 T
THIELE & SMALL Parameters
Resonant Frequency (fs) 32 Hz
DC Resistance (Re) 5.4 Ohm
BL Product (BL) 26.7 N/A
Diaphragm Mass inc. Airload (Mms) 240 grams
Mechanical Compliance of Suspension (Cms) 0.1 mm/N
Rms 5.27 Kg/s
Electromagnetic Q (Qes) 0.37
Mechanical Q (Qms) 9.3
Total Q (Qts) 0.36
Compliance Equivalent Volume (Vas) 6.9 ft³, 195.5 dm³
Surface Area of Cone (Sd) 182“², 1,174 cm²
Maximum Linear Excursion (Xmax)* 13 mm
Xdamage** 28 mm
Coil Inductance (Le) 1.45 mH
Diaphragm mass (Mmd) 217 g
Eta Zero 1.76 %
Notes
*Xmax = [(winding depth - magnetic gap depth) / 2] + (magnetic gap depth / 3)
**Maximum excursion before permanent damage
***2 Hours Test According to AES 2-1984 Rev. 2003
****Maximum power is defined as 3dB greater than nominal power
1200 W continuous program power capacity
76 mm (3 in) copper voice coil
40 - 2000 Hz response
99 dB sensitivity
Double silicone spider with optimized compliance
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