Bi-wiring

Normally the 2 terminals per channel of the amp are connected with the corresponding terminals of the speakers. Speakers might have more dan 2 terminals (binding post).

As in the picture above, there are seperate binding psot for the woofer and the tweeter.

This makes it possibe to bi-wire them.

Bi-wiring

Bi-wiring runs 2 speaker cables from the terminal of the amp to the binding post of the speaker.

Will bi-wiring do more than doubling your speaker cable budget only?

Jim Lesurf using a simple model demonstrates that there is an effect (within the constrains of the model) but very small.

DonH50 on the What’s Best Forum used a more complex model taking the RF behaviour of cables into account.
He thinks the effect is very small but seeing the ringing in the bi-wired model he concludes:

• An explanation of bi-wiring - Jim Lesurf
• Speaker Cables: Bi-wired! - DonH50
• Bi-wire, not only an advantage - Ingvar Öhman