Pundit
Post by rocl on Nov 26, 2018 12:44:03 GMT 12
I didn't want to hijack Owen Y 's thread on his system any further and i am a beginner in this, so will put this here. my LV OBX-RW's are bi-wired using 4 strands of LFD solid copper cabling per side from my LFD amp. after the cables arrived with the speakers i spent some time "re-organising" them. i took them out of the expandable white plastic protection and lightly twisted them into pairs and then lightly twisted those and sheathed them in the standard black stuff. now i am wondering if i could use the LFD wires in a different formation.
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Post by Owen Y on Nov 26, 2018 12:49:41 GMT 12
Thanks rocl - I was thinking of starting a DIY solid-core cable thread 
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Post by Owen Y on Nov 26, 2018 21:13:02 GMT 12
Hi rocl - some Qs.... - what strand size & numbers, were the orig LFD spkr cables? - how were they arranged & sheathed(?)? - what is the 'black stuff' that you wrapped your cabling with?
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Pundit
Post by rocl on Nov 26, 2018 21:28:44 GMT 12
Owen Y sorry i have no idea. they came with the LV speakers. 301oil may know. i took a photo. there is no writing on the wires. and 2 kinds although i think the cores are the same. 
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Pundit
Post by rocl on Nov 26, 2018 21:37:15 GMT 12
so now i see i just twisted the individual pairs. originally each pair were just run separately through their own protective plastic and covering.
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Member
Post by mijoh on Nov 27, 2018 1:13:47 GMT 12
Text deleted as posted in wrong thread
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Post by Owen Y on Nov 27, 2018 9:31:13 GMT 12
rocl - thanks. Am I correct in thinking that each original LFD (plastic tube?) contains a (single?) strand of solid copper conductor wire? There were 4 of these 'tubes'. Are the conductors all the same diameter size? Are the conductors coated? Or bare copper?
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Post by michaelw on Nov 27, 2018 9:44:14 GMT 12
Thanks rocl - I was thinking of starting a DIY solid-core cable thread
been there, sort of... 
2nd entry in link
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Pundit
Post by rocl on Nov 27, 2018 11:15:41 GMT 12
rocl - thanks. Am I correct in thinking that each original LFD (plastic tube?) contains a (single?) strand of solid copper conductor wire? There were 4 of these 'tubes'. Are the conductors all the same diameter size? Are the conductors coated? Or bare copper? yes, 4 tubes per speaker, solid copper, and same diameter as far as i can tell and no coating. i have them bare wire connected apart from the banana's to the amp where the 2 strands are soldered to one plug. the LV's have 2 inputs labelled H F and 2 labelled bass. i have the ones with the thinner covering going to H F from amp to OBX to speaker.
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Post by Owen Y on Nov 27, 2018 12:03:23 GMT 12
What was the difference in sound, when you 're-organised' the LFD cables? Changes, improvement?
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Pundit
Post by rocl on Nov 27, 2018 12:53:58 GMT 12
i didn't notice anything but didn't really listen for any as sound quality didn't enter my mind. i now realise that was a bit thoughtless of me but my purpose was to reduce the no. of cables from 8 to 4.
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Post by Owen Y on Nov 27, 2018 13:22:26 GMT 12
The Living Voice OBX-RW are v sensitive (94dB/W) & average impedance (6 ohms), so current demands will be v low. You may be able to get away with only 1 strand to the bass unit & return. (Treble similar.) Geometry of a single strand cable, becomes irrelevant - except for holding the wire mechanically somehow (to minimise vibration) & the tubing does this.
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Pundit
Post by rocl on Nov 27, 2018 13:33:21 GMT 12
i think that's what i have. a single strand to each post 
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Pundit
Post by rocl on Nov 27, 2018 16:50:59 GMT 12
so have i used the term "twisted pairs" incorrectly? i took it as 2 wires, but is it 2 going the same way?
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Post by Owen Y on Nov 28, 2018 8:23:45 GMT 12
'Twisted pair' is just a general expression. For interconnects it usually means a +ve & a -ve conductor twisted together. (As opposed to 'coaxial', when the +ve conductor is surrounded by a -ve 'shield' or 'screen' mesh acting as -ve signal 'return'.)
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Pundit
Post by rocl on Nov 28, 2018 12:11:01 GMT 12
 right! i get easily confused these days. since you're not telling me to change anything, can i assume how the cables are set-up is ok?
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Post by Owen Y on Nov 29, 2018 9:52:22 GMT 12
If your spkrs are sensitive, you should be able to use a single strand per drive/polarity. Not familiar with putting wire inside a tube (I tried once) or the LFD cables, but if it sounds OK (full bandwidth & dynamic) to you, then should be fine.
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Post by Owen Y on Nov 30, 2018 9:51:10 GMT 12
A question: Do you have the External Crossover version of the OBX-RW lspkrs? If so, your amp > crossover cabling would be most influential - what cable do you have there?
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Pundit
Post by rocl on Nov 30, 2018 16:13:55 GMT 12
A question: Do you have the External Crossover version of the OBX-RW lspkrs? If so, your amp > crossover cabling would be most influential - what cable do you have there? OBX stands for out board crossover. the others are called IBX - no prizes for working out what that stands for. perceived wisdom is that it is better to have same cables right through. i have lfd right through.
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Post by Owen Y on Nov 30, 2018 20:36:39 GMT 12
OK, the amp > xover cable, being much longer, would have greater influence on sound, probably, than the xover > spkr drivers cables.
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Pundit
Post by rocl on Nov 30, 2018 21:09:32 GMT 12
currently the cables are the ones i "inherited" with the speakers when i purchased them. amp to obx is 3.5m and obx to speaker is 2m. i have pondered over best placement for the obx's. in my current room the amp is in the middle of the back wall, but i will be moving and building in about a year and am thinking to put amp and sources on a side wall. having the speakers out in the middle of the room, which will be the main living space, will be OK, but not another 2 boxes as well. i am considering placing them along the wall and cabling out to the speakers. in that case i would just swap the cables around.
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Post by Owen Y on Dec 1, 2018 12:39:29 GMT 12
Not sure what LV recommend, but the spkr xover absorbs some energy/power, so technically better to place them near the spkr cabinets - with short links to drivers. (Having the xover external of course removes the components from the mechanical vibration, but more importantly IME, removes the xover from the magnetic EMF of the magnets, woofer esp. I found this out years ago, removing the xover from the spkr cabinets onto the floor, results in greater dynamics.)
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right! i get easily confused these days.