Bi-wire: is it worth it?

They have four terminals, and can be bi-wired.

Keep in mind that a vast majority of speakers "can be bi-wired." IMHO, very few have actually been designed for this, and for most of them, it is just "audio fashion."

A few years ago, while reading a Q&A section in a magazine, a manufacturer was asked why they removed the bi-wire terminals from the latest version of a speaker. Their answer was that it was originally done to be like other speakers, but they had finally determined through listing tests that bi-wire compromised coherency.

Al is spot-on, it's like a roll of the dice, maybe higher, maybe lower, or same as the previous roll.

I think everyone will agree that the factory jumpers between the terminals should be replaced when using single wire cables.

Per the above poster...
"Keep in mind that a vast majority of speakers "can be bi-wired." IMHO, very few have actually been designed for this, and for most of them, it is just "audio fashion."

This is very true. And then, there are many well accepted
speaker manufacturers that do not even bother with bi-wiring/bi-amping by providing only one pair of binding posts - Vienna Acoustics, Dynaudio, Sonus Faber, etc.

As a Vienna owner, I sure am glad they have given me one less thing to obsess over so I can just sit back and enjoy the music.

Biwire is basically doubling up on the wire Gauge. If you notice a difference you would have most likely noticed a difference by just getting thicker wires. Think about it, it's now twice as much wire to conduct that signal. I really believe this is where the benefits truly come from.

I think the results also vary with different speakers and different wire. I would at least recommend that your jumpers be the same as your main cable.

There is an interaction between speakers by "Back EMF" generated voltage. Bi-wiring separates speakers by inductive reactance of the wires' and amp's output impedance divider. It works for some speakers more than for the others. I think it depends on xover design.