Specifications
Nominal Diameter 460 mm (18 in)
Nominal Impedance 8 Ω
Minumum Impedance 6.1 Ω
Power Handling
(40 –400 Hz)
Nominal11000 W
Continuous Program22000 W
Sensitivity (1W/1m)397 dB
Frequency Range 30-1500 Hz
Voice Coil Diameter 100 mm (4 in)
Winding Material Copper
Former Material Glass Fibre
Winding Depth 25 mm (1 in)
Magnetic Gap Depth 12 mm (.47 in)
Flux Density 1.1 T
Also available in 4 Ω, data upon request
Thiele & Small Parameters4
Fs 34 Hz
Re 5.2 Ω
Qes 0.33
Qms 5.3
Qts 0.31
Vas 227 dm3(8.0 ft3)
Sd 1210 cm2(187.6 in2)
η02.5 %
X max ± 9 mm
X Var ± 11 mm
Mms 201 g
Bl 25.8 T·m
Le 2.0 mH
Mounting and Shipping Information
Overall Diameter 460 mm (18 in)
Bolt Circle Diameter 440 mm (17.3 in)
Baffle Cutout Diameter 422 mm (16.6 in)
Depth 188 mm (7.4 in)
Flange and Gasket Thickness 16 mm (5/8 in)
Net weight 13 kg (28.6 lb)
Shipping Weight 14.8 kg (32.6 lb)
Shipping Box 520x520x240 mm (20.5x20.5x9.4 in)
1 2 hours test made with continuous pink noise signal (6 dB crest factor) within
the specified range. Power calculated on rated minimum impedance.
Loudspeaker in free air.
2 Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
3 Applied RMS Voltage is set to 2.83V for 8 ohms Nominal Impedance. Average
SPL from 200 to 1200Hz.
4 Thiele-Small parameters are measured after a high level 20 Hz sine wave precon-
ditioning test.
18 TBX 46 |Speakers
The most powerful 18" in our product range, 2000 W continuous program
power handling, defines the "state of the art" about LF reproduction. A
four inch copper wire voice coil with very high thermal capability and a
ventilated magnet assembly allows a low power compression. A very low
distortion figure is obtained using a double spider design and dual
demodulation rings in the magnetic path. Proprietary water-proof cone
treatment for safe use in adverse climatic conditions.