The Colossus 15XB is intended for use as a high-output sub-bass driver either singly or in multiway systems. The unit features a 4-inch voice coil immersed in a symmetric magnetic field and centralized by using two suspensions in a dual arrangement to maintain ultra linearity and stability at high excursions. The heavily ribbed straight-sided paper cone membrane is reinforced with high-strength composite fi bres to resist deformation under extreme loads. The driver handles 800 Watts (E.I.A.) continuous and can cope with peaks in excess of 3200 Watts. This is due to advanced thermal management in the form of a vented die-cast chassis and motor system using an internal heatsink coupled to a large vaned heatsink mounted on the rear of the unit. These measures effectively remove heat from the voice coil resulting in extremely low power compression. The Colossus 15XB is designed for use in 70 to 150 litre ported enclosures.

Electro Acoustic Specifications

• Nominal Diameter 15"
• Impedance 8 ohms
• Power Rating 800W IES
• Program Power 1600W
• Peak Power 6dB Crest Factor 3200W
• Frequency Range 40 Hz - 1.0 KHz
• Sensitivity 99 dB/W @ 1m
• Magnet Weight 126 oz
• Magnetic Gap Depth 10mm
• Voice Coil Diameter 4"
• Coil Winding Length 23 mm
• Coil Material Copper
• Former Material Glass Fibre

• FS Hz 38 Hz
• RE Ohms 6 .5
• Qms 7.48
• Qes 0.336
• Qts 0.32
• Vas 168 litres
• Vd 0.637 litres
• CMS 0.164mm-N
• BL 22.28 Tm
• Mms 104g
• Xmax 7.5mm
• Sd 855.3sq cm
• Efficiency 1.67%
• Le (1k Hz ) 2.191mH

Mounting & Shipping Information

• Overall Diameter 16.02' / 407 mm
• Width Across Flats 15.25' / 387 mm
• Baffle Hole (Front Mount) 13.85' / 352 mm
• Flange Height 0.30' / 7.8 mm
• Mounting Hole Diameter & Quantity 4 x 7.1 mm dia on 393.7 PCD / 8 x 7.1 mm dia on 370 PCD / 4 x 0.281' dia on 15.5 PCD / 8 x 0.281 dia on 14.56 PCD
• Overall Height 7.24' / 184 mm
• Nett Weight 13.6 kg
• Shipping Weight 14.6 kg
• Packing Carton Dimensions 230 x 440 x 440 mm