Living Voice IBX-RW4 LoudspeakerIBX RW4 Loudspeaker RW4 is the top model in the range, available with either inboard (IBX) or outboard (OBX) crossovers. The IBX RW4 inboard crossover variant has the advantage of a closer coupling of the crossover filters to the drivers. This gives a marginally tighter presentation and a slightly more determined, urgent feel. There is shape and texture across the full frequency range and the bass performance is deep and rich with scale, authority and