agree with the quality jumpers...don't bother with internal biwire...dual run is great, but must be compared to double cost main cables/jumpers for accurate comparison...
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Having run a bi-wire set up for many years, I do not agree that running bi-wire is 'useless' as itzhak1969 claims. Many speakers have their x-overs optimized for a bi-wire set up, including many of the SF models. If you have the option of running bi-wire and can accommodate that vs. running single wire onto the bi-wire connections and then using a decent jumper, IME the bi-wire set up is superior. This has always been my experience if the speaker was designed for this type of connection. ( albeit many were not).
Without prejudice to the effects that the absolute benefits are always system dependent, a chunk of the high-end quality build speaker cable brands are moving away from bi-wiring in favour of shotgunned speaker cable runs and jumpers.... ... Bi-amping is a Different story.
“.... it’s a fair bet that the same cables wired in a shotgun configuration (or all wired to the bass terminals) and used in conjunction with purpose built links, like the Norse Jumpers, will offer better performance still.
• Just because your speaker offers multiple input cabling doesn’t mean that bi- or tri-wiring will necessarily produce better results.
Even if your speakers do sound better bi-wired, often the best route to optimum performance will involve a period of single-wired operation (that’ll be while you are saving up for a second run of really good speaker cable). So, how should you set about cabling your speakers?
• Use a set of matching bi-wire jumpers constructed using the same cable or cable technology as your main speaker wires...”
".... Many hi-fi and home cinema loudspeakers have two pairs of binding posts. This allows the speaker to be either bi-wired using two sets of loudspeaker cable or bi-amped using two amplifiers.
As a general rule (and there will always be exceptions) we tend to find that bi-wiring will open out the sound stage and increase perceived levels of detail. However, single wiring will often sound the most musically coherent.
There is also an issue with single and bi-wire speaker cables. In all the research we have carried out, a single wire speaker cable out-performs a bi-wire cable of equivalent cost. This makes a lot of sense; the single wire speaker cable has two high quality conductors and the bi-wire cable requires four.
So for a given budget, we believe that a single wire cable will always out-perform the equivalent bi-wire cable, so much so that we no longer produce dedicated bi-wire cables..."
For me, after extensive experimentation with biwiring with numerous high end speaker brands (including NORDOST...) the shotgunned NORDOST FREYs with matched shotgunned FREY jumpers bested all comers. The differences were not subtle.