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Post by vneal on May 11, 2015 18:16:14 GMT -5
I have B&W speakers which you can biwire or single (+-) wire with the bars or without the jumper bars. Does anyone think you can hear a direrence if you put the speaker cable jumpers in Vs leaving the jumper bar? And why?
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ttocs
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Post by ttocs on May 11, 2015 18:48:55 GMT -5
I have not done any A/B testing of bars vs jumpers with my speakers. Until yesterday I had been using jumpers made from the same speaker wire coming from the amp. The reason for this is that it seemed logical to use the same spec wire all the way through to all the posts on the speakers.
Since your post, I decided to measure the bars and jumpers to see if there was any difference in resistance. There is. The bars are 0.6 ohms, the jumpers are 0.1 ohms.
I haven't used the bars for a couple years now so it's difficult for me to remember what - if any - difference there would be. I removed the bars when I started passively biamping.
edit: Since I got the XMC-1 I hadn't been able to biamp - until yesterday - when I made some XLR Y cables. VVVVVVVVery happy! |
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Post by brubacca on May 11, 2015 18:49:11 GMT -5
I do all three. My main stereo uses the jumpers supplied by Sonus Faber. My TV system is biwired because my cardas wire has 4 conductors. My basement/workout speakers use a short jumper wire because I lost the connector bars.
I have zero proof or tests to confirm that any one sounds better than the other. That is just how it worked out. I did it initially because everyone said it would sound better. I never tested it.
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Post by vcautokid on May 11, 2015 18:52:24 GMT -5
Only when I lost the jumpers in a move. And even then I can't remember if it did any good. I do know, it didn't do any harm.
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Post by LuisV on May 11, 2015 19:01:23 GMT -5
I've had my B&W 804Ms and HTM center bi-wired, originally with Kimber 8TC and for the last 5 years or so with Canare 4S11. For the last few months I've been auditioning various speakers in my room; however, a few speakers have only had a single pair of binding posts. To make it easier when swapping cables between speakers, I converted the Canare 4S11 to accommodate the speakers with a single pair of binding posts and placed a wire jumper on the B&W posts (can't locate the straps) and low and behold, I hear no difference between bi-wired or not. I used some spare Canare 4S11 wire to make the jumpers. Just my experience...
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Post by tslack on May 11, 2015 19:13:24 GMT -5
The main advantage I found was what removing the jumpers made possible. If I was running a stereo amp with long lengths of speaker wire, I could get another identical stereo amp and move them both by each speaker (needed Y cable or amp with signal throughput to other channel). This limited the length of amplified signal via speaker wire (even better if I could run balanced cable from preamp to amp), and I thought it improved the sound.
Now, if that allowed you to bypass an internal crossover (speaker with external crossover), that's a whole 'nother ball game.
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Post by ron526 on May 11, 2015 19:14:51 GMT -5
I use 12/14 gauge (romex) to jumper my speakers.
Ron
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Post by qdtjni on May 11, 2015 19:43:11 GMT -5
FWIW, B&W 800 D series comes with with wire jumpers.
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Post by deltadube on May 11, 2015 19:50:20 GMT -5
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Post by novisnick on May 11, 2015 19:55:19 GMT -5
Bob, you have a good point!
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Post by deltadube on May 11, 2015 19:57:53 GMT -5
Bob, you have a good point! yes buy more wire and bi wire eh!!!! can look good too!!! cheers |
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Post by garbulky on May 13, 2015 16:56:34 GMT -5
I run biwire cables. I think I may have a small performance difference. But it's really subtle if there was. Just a bit more of an ease to the sound. I wouldn't be able to identify it and it may have more to do with increasing the thickness of the wire than anything.
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Post by MusicHead on May 13, 2015 17:02:04 GMT -5
Ohm's Law applies equally to cable, jumpers and bars  . |
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Post by vneal on May 13, 2015 17:19:41 GMT -5
Ohm's Law applies equally to cable, jumpers and bars . Really? Most jumper bars are made of brass. Are you saying brass is as conductive as copper or silver |
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Post by geebo on May 13, 2015 17:23:29 GMT -5
Ohm's Law applies equally to cable, jumpers and bars . It absolutely does. But it doesn't mean that brass and copper have the same conductivity. They don't. Does it matter with that short of a run? Probably not. |
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Post by Cory Cooper on May 13, 2015 18:34:08 GMT -5
I have run bi-wire cables without the jumpers and normal cable with the jumpers on my B&Ws. I don't hear a difference. I have also tried every way to connect the cables with the jumpers in place - both on the bottom connectors, both on the top, and crisscrossed both ways - no difference.
I am happy with my normal connection scheme of the jumpers and the Emotiva X Series cables.
C
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Post by AudioHTIT on May 14, 2015 0:21:14 GMT -5
My B&Ws did not come with bars, only jumpers. I bi-wire my LCR and use jumpers on the sides and rears. I can't imagine hearing a difference between bars and jumpers, but it's possible.
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Post by MusicHead on May 16, 2015 17:00:03 GMT -5
Ohm's Law applies equally to cable, jumpers and bars . Really? Most jumper bars are made of brass. Are you saying brass is as conductive as copper or silver Yes, really, Ohm's Law applies to every conductor to which a voltage is applied and through which a current flow. But that is not saying that all conductors have the same conductivity. Where do you see that in my statement?  What I was alluding to is that, regardless of what the actual conductor used is, Ohm's Law dictates what losses (voltage drop) you will have for a given current going through it based on the resistance, which of course depend on the resistivity of the specific material, no arguing with that, but also on other factors, such as length, contact resistance (there might be oxidation) and section/thickness. |
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morfious
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Post by morfious on May 17, 2015 16:26:10 GMT -5
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DYohn
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Post by DYohn on May 17, 2015 16:31:17 GMT -5
I have B&W speakers which you can biwire or single (+-) wire with the bars or without the jumper bars. Does anyone think you can hear a direrence if you put the speaker cable jumpers in Vs leaving the jumper bar? And why? No. A conductor is a conductor as long as it is not introducing resistance. |
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