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Join speaker cable

Discussion in 'audio' started by Stereoasishead, Feb 13, 2020.

  1. Stereoasishead

    Stereoasishead pfm Member

    Had a bit of a disaster today. We had a carpenter in doing some work in our lounge. My speaker cable is buried under the wooden floor he was working on. I forgot to mention it...it’s been cut almost perfectly in the middle of an 8m run.

    The cable is Naim Nac A5. Can I join it? If so what’s the best method? I’m not keen on replacing it as it’s all tracked between the wall and the floor...


  2. davidsrsb

    davidsrsb pfm Member

    Copper stranded is easy. Split the pairs a bit. Slide some heatshrink tubing over one set of cut ends and slide along several inches.Solder cut ends together and fit heatshrink over the joints and shrink it
  3. Stereoasishead

    Stereoasishead pfm Member

    Excellent, does it matter what type of solder? Thanks
  4. Wobblybob

    Wobblybob pfm Member

    You could also crimp it.
  5. Yank

    Yank Bulbous Also Tapered

    Rosin core, NOT lead-free.
    cctaylor likes this.
  6. Whatsisnaim

    Whatsisnaim pfm Member

    NACA5 is not the easiest cable to solder, and I certainly wouldn’t attempt it unless you have an iron with plenty of power. If you’re not sure, best to get someone who is well practiced, although I realise this may be difficult if it has to be done in situ. At the very least, get hold of some offcuts and have a few practice runs before you wade in.
    Mr Pig likes this.
  7. stevec67

    stevec67 pfm Member

    If it's in the void a mains junction box will do it. Or a chocolate block connector.
  8. Suffolk Tony

    Suffolk Tony Aim low, achieve your goals, avoid disappointment.

    Yes, just solder it with a reasonably powerful (75W+) iron & ordinary solder - heatshrink & it's a good 'un. There will be no audible effect on sound quality.
    SteveS1 likes this.
  9. Pete MB&D

    Pete MB&D Pete Maddex, the one and only!

    +1 on the chock block.

  10. DavidS

    DavidS pfm Member

    I have had 2runs of NACA5 soldered together with no probs at all , no reduction in sq.

    As mentioned you need a powerful soldering iron and a very competent person who can solder.The whole thing can be shrink wrapped.
  11. jwdude

    jwdude Active Member

    Just remember to disconnect cable from amp and speakers before soldering.

    Otherwise good chance of blowing your amp.
  12. Yank

    Yank Bulbous Also Tapered

    Pine Marten and Joe like this.
  13. Arkless Electronics

    Arkless Electronics Trade: Amp design and repairs.

    Solder it. Nothing else will do. Dead easy.
    Suffolk Tony, cctaylor and stuwils like this.
  14. gregory lynch

    gregory lynch pfm Member

    You should'nt have to tell him, any good tradesman would have used a meter to check under the floorboards.when I was a plumber I would always check for hidden pipes and electrics, it's his fault, knock it off the bill.
  15. Stereoasishead

    Stereoasishead pfm Member


    Soldering won’t be a problem for me, plenty of experience there so I’ll go for that!

    would be tricky to hide a chock block.

  16. JemHayward

    JemHayward pfm Member

    I had to extend my NAC A5 for my active Isobariks, as buying a new cable set was going to be rather expensive (though relatively cheap by today's prices). I cleaned about an inch of cable from each end, and sort of knitted them together. Got the whole lot warmed up with a hot air gun, then a 50W iron did the job, heat shrink over the join, and it was fine for many years... in fact the same cables are in use in Paris to this day...
  17. Cereal Killer

    Cereal Killer fourhundredandthirtytwo

    I'd recommend rewiring the whole house back to the incoming tails. :D
  18. Joe

    Joe pfm Member

    It's funny to observe that ,whilst people pontificate about the desirability of cables being constructed from single crystal 99.9999% oxygen free copper, a big lump of lead ( which is what solder is *** ) is seen as no problem at all in the signal chain. Don't get me wrong...I am in no way in the market for any foo...I just think that it is funny to observe.

    *** I have long observed just how much common or garden lead there is in a signal chain ... the foo fans ignore the awkward questions there.
    Shadders likes this.
  19. Suffolk Tony

    Suffolk Tony Aim low, achieve your goals, avoid disappointment.

    I suppose you could justifiably argue that, given the copper strands are wrapped around each other before soldering, the amount of lead in comparison to the quantity in the whole cable's pretty minuscule, isn't it?
  20. Tw99

    Tw99 source last

    The presence of lead is of course important to provide some weight and solidity to the sound. The use of lead free solder in modern digital equipment is one reason why it always sounds so bright and edgy.
    Shadders likes this.

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