The industry-standard B&C Speakers 18TBX100-4 features a 1" long/4" diameter copper wire voice coil with high thermal capability, and a ventilated magnet assembly, both of which contribute to low power compression. A very low distortion figure is obtained using a double spider design and dual demodulation rings in the magnetic path. The 18TBX100-4 is fortified by a proprietary water-proof cone treatment that facilitates safe use in adverse climatic conditions. This benchmark pro subwoofer driver is found in many famous manufacturers' well-established loudspeaker enclosures.
Power Handling (RMS)1,200 Watts
Power Handling (max)2400 Watts
Frequency Response35 to 1,000 Hz
Sensitivity98 dB 2.83V/1m
Voice Coil Diameter4"
Resonant Frequency (Fs)30 Hz
DC Resistance (Re)3.7 ohms
Voice Coil Inductance (Le)1.73 mH
Mechanical Q (Qms)7.0
Electromagnetic Q (Qes)0.33
Total Q (Qts)0.31
Compliance Equivalent Volume (Vas)9.04 ft.³
BL Product (BL)22.0 Tm
Diaphragm Mass Inc. Airload (Mms)230g
Maximum Linear Excursion (Xmax)9 mm
Surface Area of Cone (Sd)1212.0 cm²
Materials of Construction
Cone MaterialCoated Paper
Voice Coil Wire MaterialCopper
Voice Coil FormerFiberglass
Basket / Frame MaterialCast Aluminum
Overall Outside Diameter18"
Baffle Cutout Diameter16.6"
Bolt Circle Diameter17.3"
# Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)