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In Reply to: RE: andyr can you clarify? regarding your post below I am buying some Belden 1585A cable posted by PhilJ on June 24, 2015 at 18:19:25
Hi Phil,
Thanks for the info that Take5Audio sells cryo treated 1585A in small lengths. I did not know this.
I have just had most of a 1000' roll of 1585A installed in my new house (wiring up 4 rooms back to the hifi system). These were long runs (up to 50') so I used 2 jackets to each speaker - 1 jacket (8 wires) for '+' and 1 jacket for '-'.
For 7' runs you could also do this; this gives the minimum 'C' (which amps like) but maximum 'L' (which acts as a brake on speaker current). But as these are all ancillary speakers in my house ... SQ is not a problem. :-))
For 7' runs, you could use just 1 jacket to each speaker - ie. 2 twisted pairs for '+' and the other 2 pairs for '-'. This gives higher 'C' - which shouldn't be a problem as the cables are only 7' - and lower 'L', however, I personally would be worried about only having 4x 24g wires carrying the current.
If the Take5Audio cryo product is expensive, perhaps try this first; if it's affordable then I would again use 2 jackets to each speaker.
However, for 7' cables, I would use 2 twisted pairs from each jacket for '+' and the other 2 pairs from each jacket for '-'. This way you end up with:
* 8x 24g wires going to each speaker terminal (for high current)
* less 'L' than just using 1 whole jacket to each speaker terminal (so better SQ), but
* greater 'C' ... which your amp should be able to cope with, given the wires are only 7' long. However, you should perhaps ask the mfr how this amp copes with capacitance on speaker cables - one way of asking this question is to ask whether they are suitable for driving electrostatics (which are high 'C'!). If the amp doesn't like 'C' - and some amps don't (I blew up a Harmon Kardon "wide bandwidth" amp about 15 years ago trying to use it with long speaker cables! :-(( ) - then go back to 1 jacket to each speaker terminal.
Regards,
Andy
Follow Ups:
I know this matters but wonder how much it would matter in my short runs?
.
...
they also post this disclaimer: According to a product engineer at Belden, the new version of the 1585A still uses Teflon as the insulation material that is in direct contact with the conductor. The change that has been made is that the Teflon is only a thin layer which then has Polyolefin applied over it to build up the overall thickness of the insulation.I think this is normal if I remember correctly I hope so.
I will do a shootout between the Anti Cable and the Belden and report my findings here in about a month or so (as both have to break in) fwiw using my SMGa driven by Outlaw Audio amp and source is Muse model nine Ref sig CD player thru Mogami 2534 ICs.
Edits: 06/25/15
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