- Nominal Basket Diameter: 18", 457mm
- Nominal Impedance: 8 ohms

Power Rating:
- Watts: 1000W
- Music Program: 1000W

- Resonance: 28Hz
- Usable Frequency Range: 37Hz-250Hz
- Sensitivity: 96
- Magnet Weight: 67 oz.
- Gap Height: 0.380", 9.53mm
- Voice Coil Diameter: 2.5", 63.5mm

MPN: DELTA PRO-18A
UPC: 876358001613

THIELE & SMALL PARAMETERS
- Resonant Frequency (fs) 28Hz
- Download PDF Spec Sheet
- DC Resistance (Re) 5.3
- Coil Inductance (Le) 3.43mH
- Mechanical Q (Qms) 10.38
- Electromagnetic Q (Qes) 0.33
- Total Q (Qts) 0.32
- Compliance Equivalent Volume (Vas) 493.2 liters / 17.41cu.ft.
- Peak Diaphragm Displacement Volume (Vd) 796cc
- Mechanical Compliance of Suspension (Cms) 0.25mm/N
- BL Product (BL) 18.9 T-M
- Diaphram Mass inc. Airload (Mms) 128 grams
- Efficiency Bandwidth Product (EBP) 84
- Maximum Linear Excursion (Xmax) 6.7mm
- Surface Area of Cone (Sd) 1188.0 cm2
- Maximum Mechanical Limit (Xlim) 15.0mm


MOUNTING INFORMATION

Recommended Enclosure
- Sealed
- Vented 85-297 liters/3.0-10.5 cu.ft.

- Overall Diameter 18.00", 457.2mm
- Baffle Hole Diameter 16.57", 420.9mm
- Front Sealing Gasket fitted as standard
- Rear Sealing Gasket fitted as standard
- Mounting Holes Diameter 0.28", 7.1mm
- Mounting Holes B.C. D. 17.25", 438.2mm
- Depth 8.13", 207mm
- Net Weight 17.0 lbs, 7.7 kg
- Shipping Weight 20.5 lbs, 9.3 kg


MATERIALS OF CONSTRUCTION
- Coil Construction: Copper voice coil
- Coil Former: Polyimide former
- Magnet Composition: Ferrite magnet
- Core Details: Vented and extended core
- Basket Materials: Die-cast aluminum basket
- Cone Composition: Paper cone
- Cone Edge Composition: Cloth cone edge
- Dustcap Composition: Solid composition paper dust cap