koestner,
each of the above members has given you the correct answer. The thing to remember is that in (the poor man’s) bewiring (that you are asking about) it's all about controlling the impedance between the amp & speaker. By having a biwire between the amp & speaker, you force the speaker terminals to "see" the low output impedance of the power amp as opposed to having a single wire + a jumper across the speaker terminals that would bring the impedance of the x-over circuit into the picture additionally. Many speakers benefit from "seeing" the lower impedance of the power amp & that manifests itself in better bass control most notably.
"poor man’s biwiring" because in true biwiring the x-overs are external to the speaker & they can be optimized. Often these external x-overs are active (not passive as they are inside most speaker cabinets).
each of the above members has given you the correct answer. The thing to remember is that in (the poor man’s) bewiring (that you are asking about) it's all about controlling the impedance between the amp & speaker. By having a biwire between the amp & speaker, you force the speaker terminals to "see" the low output impedance of the power amp as opposed to having a single wire + a jumper across the speaker terminals that would bring the impedance of the x-over circuit into the picture additionally. Many speakers benefit from "seeing" the lower impedance of the power amp & that manifests itself in better bass control most notably.
"poor man’s biwiring" because in true biwiring the x-overs are external to the speaker & they can be optimized. Often these external x-overs are active (not passive as they are inside most speaker cabinets).