SIGMA PRO 18A Professional Series

Recommended for professional audio as a woofer in vented enclosures.

Specifications

Product type
Loudspeaker Chassis

Type
PA

Nominal Diameter
18 "

Nominal Diameter
457.2 mm

Voice Coil
3 "

Voice Coil
76.2 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
650 W

maximum rated load
1300 W

Sensitivity (1 W / 1 m)
99 dB

Frequency response
41 - 2400 Hz

Voice Coil Material
copper

Magnet
Ferrite

Depth of the magnetic gap
9.53 mm

Thiele & Small Parameter


Fs (Resonance Frequency)
28 Hz

Re (DC resistance)
6.29 Ohm(s)

Qms (mechanical quality)
8.28

Le (inductance of the voice coil)
1.9 mH

Qes (electrical quality)
0.3

Qts (overall quality)
0.29

Vas (equivalent volume)
441.2

Mms (moving mass)
130 g

BL (power factor)
22.1 T/m

Xmax (maximum displacement)
6.1 mm

Cms (elasticity of the suspension)
0.24 mm/N

Sd (membrane area)
1140 cm²

Weight
11,685 kg

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