Hi again TDR,
The Radiance 2's are basically a single-wire design at heart as all our new speakers (AE1mkIII SE onwards) are. This is because it allows us to design a simpler, better crossover. Some models/brands may work better bi-wired, some won't, with our models I'd always recommend using better single-wire cable rather than bi-wiring if possible.
The AE1mkIII had 14 components in its crossover, the SE modification brought this down to 6, the result being much improved clarity and lower distortion. For this reason we use the same philosophy on all our newer models - another benefit to fewer components is that we can use higher grade crossovers for the same price as the lower-grade ones with more components in! We also no longer use resistors, very common in crossover design to adjust levels, they have the biggest negative impact on detail retrieval in our testing.
Your Radiance 2's have just 7 components in their 2nd-order crossover, few other multi-driver floorstanders can match that low a number - this is largely due to mechanical properties we engineer into the driver assemblies to minimise driver break-up and extend useable operating parameters. The only way we could make it simpler is to go 1st-Order but this isn't really an option when using metal drivers due to their break-up points. There would be no real benefit in bi-wiring them - they will be better single-wired with that particular crossover design. We only add a bi-wire option on the Radiance due to market demands in some countries.
Other manufacturers may design in bi-wire configuration which may mean they work better that way - we all do things differently!
As with most things Hi-Fi, less is usually more! (he says after writing an essay!
)
Cheers,
Jim.