TWEETER AND WOOFER TWO-WAY Vented reinforced plastic chassis. Proprietary cone material with natural fibres made in-house. Soft low damping rubber surround for improved transient response. Optimized motor system. Non-resonant long life lead wires. Compact large surround dome tweeter. Coaxial refers to the application of having the tweeter mounted centrally in the same driver mechanism as the mid-woofer. This offers a convenient solution for a compact box design utilizing a smaller facia without the additional tweeter mounting. Being mounted "Inside" the woofer also improves acoustic performance with optimal time delay between the drivers and offer the advantages of a single point source for a consistent acoustic center and a symmetrical dispersion pattern. SB Acoustics coaxial drivers require an external crossover network. This is to be custom developed by the designer depending on the extent of the application and the designers preferences in driver matching, etc. See datasheet ~3KHz 12dB/Octave. Vented reinforced plastic chassis Proprietary cone material with natural fibers made in-house Soft low damping rubber surround for improved transient response Optimized motor system Non-resonant long life lead wires Compact large surround dome tweeter Tweeter specifications: Nominal Impedance 4 ? DC resistance, Re 3.0 ? Voice coil diameter 12.4 mm Voice coil height 1.2 mm Air gap height 1.5 mm Free air resonance, Fs 1300 Hz Sensitivity (2.83V/1m) 89 dB Rated power handling* 10 W Magnetic flux density 1.05 T Magnet weight 0.003 kg Net weight 0.014 kg * IEC 268-5, high-pass Butterworth, 3 kHz, 12 dB/oct.