Fane Pro Audio – Colossus Prime 15XS Sub Bass Driver


The Prime 15XS 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 15XS exhibits 98 dB sensitivity and can deliver bass down to 29 Hz (-6 dB) in a 200

  • Please enquire about alternative impedances.
  • A.E.S. power handling test. Pink noise bandpass filtered at 12 dB per octave with cutoff frequencies of 30 Hz and 300 Hz. Driver mounted in free air, test signal applied at rated power for two hours.
  • Please note that the frequency response measurements are supplied for comparison only and are not a measure of the low frequency performance which may be achieved in a fully optimised system.
SKU: COLOSSUS PRIME 15XS Categories: , ,



  • 2000 W Program Power.
  • 98 dB Sensitivity (1W/1m).
  • High grade Y35 ferrite magnet motor structure with Low interference flux path.
  • Vented chassis and motor design provides extremely low power compression.
  • Aluminium demodulation ring.
  • Dual silicone laminated suspension system combined with optimised software materials offers increased linearity for fast, accurate and undistorted bass reproduction at extreme SPL.
  • 12mm Xmax with 64 mm peak-to-peak travel.
  • Fibre loaded, UK manufactured cone offers increased strength, durability and performance.
  • Ideal for bass reflex and scoop designs from 125-400 Litres.
  • Also performs well in appropriately designed horn loaded systems.
  • 4-inch Inside/ outside windings copper voice coil.

Additional information



Electro Acoustic Specifications

Nominal Chassis Diameter 15″ / 381 mm
Impedance 4 /8 /16 Ω
Power Handling 1000 W (A.E.S.)
Peak Power (6dB Crest Factor) 4000 W (A.E.S.)
Usable Frequency Range (-6dB) 30Hz – 500 Hz
Sensitivity (1W – 1m) Wideband 98 dB
Moving Mass (inc. Air Load) 133 grams
Minimum Impedance (Zmin) 6.84 Ω
Effective Piston Diameter 15.43″ / 391.92 mm
Magnet Weight 145 oz
Magnetic Gap Depth 0.43″ / 11 mm
Flux Density 1.1 Tesla
Coil Winding Height 1.18″ / 30 mm
Voice Coil Diameter 4.0″ / 101.6 mm
Speaker Type Bass Driver
Speaker Series The Professional Series
Program Power 2000 W (A.E.S.)
Sensitivity (1W / 1m) Working band

Thiele Small Parameters (TSPs)

FS 36.3 Hz
Re 5.2 Ω
QMS 7.7
QES 0.32
QTS 0.31
Vas 149.7 Litres
Vd 1.01 Litres
CMS 0.147 mm/N
BL 22.1 T/m
MMS 133 grams
Xmax 12 mm
Sd 855 cm2
Effeciency 2.14%
Le 1.93 mH
EBP 113.44 Hz

Materials of Construction

Coil Former Material Glass Fibre
Voice Coil Material Copper – Inside / Outside
Magnet Material Ferrite Y35
Chassis Material Die-cast Aluminium
Cone Material Curvilinear Poly-cellulose
Surround / Edge Termination Polyvinyl Damped Multi Roll. Poly Cotton
Dust Dome Material Solid Paper (Inverted)
Connectors Push-button Spring Terminals
Polarity Positive voltage at red terminal causes forward motion of cone

Mounting / Shipping Information

Overall Diameter 16 / 406.4 mm
Width Across Flats 15.25″ / 387.4 mm
Flange Height 0.305″ / 7.8 mm
Baffle Hole Diameter F/M 13.85″ / 351.79 mm
Baffle Hole Diameter R/M 14″ / 355.79 mm
Gasket Supplied Front & Rear
Outer Fixing Holes 4x ø 0.281″ on 15.5″ PCD / 4x ø 7.1 mm on 393.7 mm PCD
Inner Fixing Holes 8x ø 0.281″ on 14.56″ PCD / 8x ø 7.1 mm on 370 mm PCD
Depth 7.71″ / 196 mm
Weight 28 lb / 12.7 Kg
Recommended Enclosure Volume 2.47 – 4.41 cu ft /70 – 125 Litres
Shipping Weight 30.45 lb / 13.8 Kg
Packing Carton Dimensions (W) 430 (D) 430 (H) 230 mm
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