Fane Colossus PRIME 18XS 18" 1200W 8 Ohm Twin Pack

The Prime 18XS is intended for use as a high-output bass driver in multi way systems and features a 4 inch 'sandwich' (inside and outside windings) voice coil, immersed in a symmetric magnetic field yielding increased linearity and lower distortion.
This, coupled with laminated silicone suspensions, a large Xmax of 12mm with peak to peak travel of 60mm, ensures fast accurate bass at high levels of excursion. The cone membrane, manufactured from polycellulose, is much stronger and more durable than conventional paper pulp alternatives.
This allows the driver to combine high-sensitivity with the structural integrity required to produce undistorted low frequencies at extreme sound pressure levels.

The driver handles 1200 Watts (A.E.S.) continuous and can cope with peaks in excess of 4800 Watts. This is due to advanced thermal management in the form of vented die-cast chassis and increased motor system venting. These measures effectively remove heat from the voice coil, resulting in extremely low-power compression.

The Prime 18XS exhibits 100 dB sensitivity and can deliver bass down to 29 Hz (-6 dB) in a 200 litre ported enclosure.

Key features of the Colossus PRIME 18XS include:

• New motor structure (highly optimised by FEA, Y35 highest ferrite grade, low interference flux path)
• Massive 64mm p-p excursion capacity
• Newly designed chassis
• 30mm voice coil height
• New high profile back plate

Electro Acoustic Specifications:

• Nominal Chassis Diameter: 18"
• Impedance: 8 Ohms
• Power Handling: 1200W (A.E.S.)
• Peak Power (6dB Crest Factor): 4800W (A.E.S.)
• Usable Frequency Range -6dB: 35 Hz - 500 Hz
• Sensitivity (1W / 1m): 100 dB
• Moving Mass inc. Air Load: 177 grams
• Minimum Impedance Zmin: 6.5 Ohms
• Effective Piston Diameter: 15.43" / 392 mm
• Peak Displacement Volume of Cone Vd: 1.45 litres
• Magnet Weight: 120 oz
• Magnetic Gap Depth: 0.43" / 11mm
• Flux Density: 1.1 Tesla
• Coil Winding Height: 1.18" / 30mm
• Voice Coil Diameter: 4.0" / 101.6mm

Thiele Small Parameters:

• FS Hz: 33Hz
• RE Ohms: 5.2 Ohms
• Qms: 8.2
• Qes: 0.404
• Qts: 0.385
• Vas Ltr: 257
• Vd litres: 1.45
• CMS (mm/N): 0.124
• BL T/m: 22.4
• Mms (grms): 188
• Xmax (mm): 12
• Sd (cm2): 1210
• Efficiency %: 2.2
• Le (1k Hz): 1.5mH

Materials Of Construction:

• Former Material: Glass Fibre
• Voice Coil: Copper 'sandwich' inside external windings
• Magnet Material: Ferrite
• Chassis: Die-cast Aluminium
• Cone: Straight polycellulose Ribbed Cone
• Surround / Edge Termination Polyvinyl Damped Multi Roll, Poly Cotton
• Dust Dome: Solid Paper (Inverted)
• Connectors: Push-button Spring Terminals
• Polarity Positive Voltage at Red Terminal Causes Forward Motion of Cone

Mounting & Shipping Information:

• Overall Diameter: 19.1" / 485mm
• Width Across Flats: 18" / 457mm
• Flange Height: 0.465" / 11.8mm
• Baffle Hole Diameter F/M: 16.53" / 420mm
• Baffle Hole Diameter R/M: 16.33" / 414mm
• Gasket Supplied Front & Rear
• Fixing Holes: 8 x 0.275" diam on 18.425
• PCD / 8 x 0.275 diam on 17.25 PCD 8 x 7mm diam on 468 PCD / 8 x 7 diam on 438.15 PCD
• Depth: 8.50" / 216mm
• Weight: 33.75 lb / 15.3kg
• Recommended Enclosure Volume: 4.41 -1 4.12 cu ft / 125 - 400 litres
• Shipping Weight: 37.45 lb / 17kg
• Packing Carton Dimensions 250 x 520 x 520mm