PROFESSIONAL SERIES
COLOSSUS 18-1500
COLOSSUS 18-1500
FREQUENCY RESPONSE DATA*
+120
+110
+100
+90
dBr
The Colossus 18-1500 is intended to be used by the serious sub-bass lover. This high output driver can be
used singly or as part of a larger multi way system. It is suitable for loading in a variety of enclosures types
since it allows enclosure designers considerably more freedom with specialised loading techniques without
having to make allowances for physical characteristics or power handling limitations. The unit features a 4
inch copper-clad- aluminium, four layer voice coil immersed in a symmetric magnetic field and is centralised
by using two (D.L) suspensions in a dual alignment configuration. This ensures ultra linearity and stability at
extreme excursions. The curvilinear polycellulose cone is reinforced with high strength fibrulated nylon fibres
to resist deformation under extreme loads. This coupled with a large Xmax of 12.75mm and peak to peak travel
of 55mm ensures the driver will deliver rock solid sub bass at extraordinary high levels of excursion. The driver
will handles 1500 Watts (A.E.S) continuous and can cope with peaks in excess of 6000 watts. This is due to the
advanced thermal management in the form of a vented die-cast chassis coupled with increased motor system
and voice coil venting. The Colossus 18-1500 exhibits 97dB sensitivity and has a working bandwidth of 25Hz to
300Hz.
+80
+70
+60
+50
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
* Half space response measured in a 975 litre sealed box
IMPEDANCE
THIELE SMALL PARAMETERS
Nominal Chassis Diameter
Impedance
Power Handling
Peak Power (6dB Crest Factor)
Usable Frequency Range -6dB
Sensitivity (1 w - 1 m)
Moving Mass inc. Air Load
Minimum Impedance Zmin
Effective Piston Diameter
Peak Displacement Volume of
Cone Vd
Magnet Weight
Magnetic Gap Depth
Flux Density
Coil Winding Height
Voice Coil Diameter
FS Hz
RE Ohms
Qms
Qes
Qts
Vas Ltr
Vd litres
CMS (mm/N)
BL T/m
Mms (grms)
Xmax (mm)
Sd (cm2)
Efficiency %
Le (1k Hz)
18”
8.4 Ω
1500 w (A.E.S.)
6000 w (A.E.S.)
25 Hz - 300 Hz
97 dB
245 grams
7.2 Ω
15.43" / 392 mm
1.5 litres
120 oz
0.59" / 15 mm
1.0 Tesla
1.18” / 30 mm
4.0” / 101.6 mm
36 Hz
5.4 Ω
10.17
0.32
0.31
151
1.45
0.0797
29.1
245
12.75
1158
2.13
5.6 mH
200
100
50
20
Ohms
ELECTRO ACOUSTIC SPECIFICATIONS
10
5
2
1
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
PREDICTED BASS RESPONSE
+6
0
MATERIALS OF CONSTRUCTION
MOUNTING / SHIPPING INFORMATION
Former Material
Voice Coil
Overall Diameter
Width Across Flats
Flange Height
Baffle Hole Diameter F/M
Baffle Hole Diameter R/M
Gasket Supplied
Fixing Holes
Magnet Material
Chassis
Cone
Surround / Edge Termination
Dust Dome
Connectors
Polarity
Glass Fibre
Copper ‘sandwich’ inside
outside windings
Ferrite
Die-cast Aluminium
Straight polycellulose
Ribbed Cone
Polyvinyl Damped Multi Roll,
Poly Cotton
Solid Paper (Inverted)
Push-button Spring
Terminals
Positive Voltage at Red
Terminal Causes Forward
Motion of Cone
Depth
Weight
Recommended Enclosure Volume
Shipping Weight
Packing Carton Dimensions
•
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.
-12
-18
-24
-30
-36
5
10
50
100
500
1k
5k
10k
20k
Hz
** Normalized bass response in 200 litre tuned to 30Hz
18''
457 mm
8.48”
215.6 mm
”
.1 m
19 m
5
48
•
•
19.1” / 485 mm
18” / 457 mm
0.465” / 11.8 mm
16.53” / 420 mm
16.33” / 414 mm
Front & Rear
8x 0.275” diam on 18.425
PCD / 8x 0.275 diam on
17.25 PCD 8x 7 mm diam
on 468 PCD / 8x 7 diam on
438.15 PCD
8.85" / 225mm
33.75 lb /15.3 kg
4.41 - 14.12 cu ft /
125 - 400 litres
37.45 lb / 17 kg
250 x 520 x 520 mm
dB
-6