KeithL
Administrator 
Posts: 7,722
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Post by KeithL on Feb 18, 2020 12:31:56 GMT -5
Well....because the resistance of the jumper is negligible compared to the resistance of the speaker wires it ensures that each two wires will act exactly like one fatter wire. (Without the jumper in place exactly what happens will depend on how the speakers are wired internally.)
(And, yes, with 10 gauge wires, each six foot long, and the amount of current involved in running speakers, any difference whatsoever is going to be really really tiny.)
Note that the idea that "current takes the path of least resistance" is sort of an oversimplification. For two resistances with the same voltage across them - current flow in each will be inversely proportional to the resistance. (Each pair of wires is electrically two really low value resistors in parallel.)
So, if you have two paths of almost equal resistance, the current will be divided almost equally between them, with slightly more than half following the path of lower resistance.
(So, in this case, the current will be divided equally between the two wires...)
I'll also point out a "hidden down-side" of both bi-amping and bi-wiring... By adding more wires, and more connections, you are increasing the ways in which something can come loose, short to something else, or simply get hooked up wrong. 
No. The "spare terminal resistance" is the resistance of IT'S wiring to/from the amplifier PLUS the resistance of the jumper. Now the jumper resistance is tiny (maybe 0.005 to 0.01 ohms), but the path of least resistance is STILL down the terminal to the amplifier directly. Yeah - that makes sense thinking of it that way. I didn't see your drawing at first...didn't show up. That makes it clear. The jumper, though, doesn't seem to add any value over not having it - other than being a cool conversation piece. Mark |
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klinemj
Emo VIPs 
Honorary Emofest Scribe
Posts: 14,471
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Post by klinemj on Feb 18, 2020 13:26:54 GMT -5
Well....because the resistance of the jumper is negligible compared to the resistance of the speaker wires it ensures that each two wires will act exactly like one fatter wire. (Without the jumper in place exactly what happens will depend on how the speakers are wired internally.)
(And, yes, with 10 gauge wires, each six foot long, and the amount of current involved in running speakers, any difference whatsoever is going to be really really tiny.)
Note that the idea that "current takes the path of least resistance" is sort of an oversimplification. For two resistances with the same voltage across them - current flow in each will be inversely proportional to the resistance. (Each pair of wires is electrically two really low value resistors in parallel.)
So, if you have two paths of almost equal resistance, the current will be divided almost equally between them, with slightly more than half following the path of lower resistance.
(So, in this case, the current will be divided equally between the two wires...)
I'll also point out a "hidden down-side" of both bi-amping and bi-wiring... By adding more wires, and more connections, you are increasing the ways in which something can come loose, short to something else, or simply get hooked up wrong. Yeah - that makes sense thinking of it that way. I didn't see your drawing at first...didn't show up. That makes it clear. The jumper, though, doesn't seem to add any value over not having it - other than being a cool conversation piece. Mark Nice picking at nits... As for things going wrong with loose or shorted or incorrectly hooked up connections...blasphemy. That NEVER happens to me (at least today). Mark |
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Feb 26, 2020 10:15:01 GMT -5
Hi Boomzilla, Yours is the true bi-wire. This is quite funny as some are taking issue with my setup elsewhere with the jumpers. Does it really matter that essentially bridges are at either end of two pairs of wire after effectively doubling up the wire gauge? I don't think so but it seems that the wiring is turning out to be a conversation starter! Enjoy, William Hi @shimei - In fact, no - it makes no difference whether the speaker jumpers are installed or not. The electricity will take the path of least resistance (much like water). And assuming that the wiring directly from the power amp to the speaker terminals is that path, the vast majority of power will flow directly. The small additional resistance of the terminal jumpers will insure that little of the power will flow through them, but they don't hurt anything. Some labor under the misconception that having the terminal jumpers installed somehow defeats the intention of bi-wiring. But in fact, it just doesn't matter. I like the terminals on your main wires, by the way; what are those? Cheers - Boom Hi Boom, You gave me an idea when asking about the manufacturer of the connectors etc. Since there is a lot of great information in these Emotiva forum threads I decided to try my hand at a personal blog while using such info in summation. Included are parts list of equipment used etc. www.disqus.social/2020/02/bi-wire-tekton-designs-ulfberht-speakers.html |
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Post by boomzilla on Feb 26, 2020 20:05:08 GMT -5
Interesting, @shimei - Thanks!
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