Série SIGMA PRO 18A Professional
Recommandé dans le cadre d'applications audio professionnelles, utilisation comme boomer dans des coffrets bass reflex.
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 0.375", 9.53 mm
Voice Coil Diameter 3", 76.2 mm
THIELE & Small Parameters
Resonant Frequency (fs) 28 Hz
DC Resistance (Re) 6.29
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) 441.2 liters / 15.6 cu. ft.
Peak Diaphragm Displacement Volume 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) 1140.0 cm²
Maximum Mechanical Limit (Xlim) 18.0 mm
MOUNTING Information
Recommended Enclosure Volume
Sealed N/A
Vented 93-212 liters/3.3-7.5 cu.ft.
Overall Diameter 18", 457.2 mm
Baffle Hole Diameter 16.56", 420.5 mm
Front Sealing Gasket fitted as standard
Rear Sealing Gasket fitted as standard
Mounting Holes Diameter 0.28", 7.1 mm
Mounting Holes B.C.D. 17.25", 438.2 mm
Depth 8.15", 207 mm
MATERIALS of Construction
Copper voice coil
Polyimide former
Ferrite magnet
Vented and extended core
Die-cast aluminum basket
Paper Cone
Cloth cone edge
Solid composition paper dust cap
