Wire Help Needed! Extending existing cable length

Discussion in 'Hi-Fi Stereo Speakers' started by turoasaur, May 18, 2019.

  1. turoasaur

    turoasaur
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    Hi, I need to add 1.5 metres of cable to each speaker to fit the new room.
    I am using chord company Rumour 2 wires and my question is- can I simply buy additional length and twist them together as I would have in the 90’s, or will this actually damage the signal and I need another alternative? I imagine my options are take them to a specialist to get them to fuse together or just buy the necessary length.

    What do you think?
     
  2. DT79

    DT79
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    I’d buy new cables of the correct length. You could offset part of the cost by selling the existing ones.

    The trouble with twisting them together is that, whilst it will work, you’ll a) get greater electrical resistance because of the imperfect nature of the join, which may or may cause audible deterioration, and b) they will almost certainly loosen and the conductors oxidise over time.

    If you do extend the current ones then the best bet would be to solder the two lengths together, and then cover the exposed parts with some heat shrink or insulating tape.
     
  3. turoasaur

    turoasaur
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    Thanks DT79, makes (more expensive than I would like) sense! cheers
     
  4. Abacus

    Abacus
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    Just get standard 2.5mm sq. OFC copper cables and some Banana Plugs from Amazon; they will be a fraction of the price and as good as or better than the stuff HI Fi speaker cable manufactures produce. (They are just rip off merchants who use gobbledegook to con people into buying cheap cable with a fancy name on)

    Bill
     
  5. turoasaur

    turoasaur
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    Really? I would think people would notice, you are right that this is pushed by the industry people though. Ok will give it a road test.
     
  6. dannnielll

    dannnielll
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    Turosaur.. there are plenty of comments regarding cables. The single most important thing is a low resistance path from speaker to amplifier, hence 2.5 mm sq wire. Even thicker wire 4 mmSq or 6 mmsq is better, but the law of diminishing returns hits in about 2 mmsq. For reasonable lengths
    I am going to slightly disagree with Abacus, regarding cheap cable.. Those specialist cable suppliers are producing very expensive product and can be justifying their decisions with spurious physics. Certain winding geometries will have marginal effects on capacitance and inductance, and using pure silver instead of copper is more expensive. So the manufacturers can justify their prices. . The physical measurements can identify in some cases subtle and marginal differences, but whether they are capable of making an audible difference is another matter. .Whether the manufacturers actually believe that these modifications matter is conjecture They may in most cases be just deluding themselves,as well as purchasers.
     
  7. turoasaur

    turoasaur
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    Thanks Dannnielll, so although you recommend thicker cable you think that sonically cheaper cable will still give good results. I will try and let you know how I go. Thanks for replying.
     
  8. dannnielll

    dannnielll
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    There is an audible difference between say bell wire and even 0.6mm sq copper wireT(cable used for a single light fitting.) , As the conductor thickness increases less and less audience panels can distinguish between thick and thicker and in random order blind testing ,it tends towards 50% above 2mmsq. . It is somewhat dependent on the length of cable and the ohms rating on the speakers.
    Now the material cost of copper cable depends on the thickness of copper and also on the thickness of the plastic insulation. .. Indeed for small gauge cables, the insulation might be more expensive than the metal!. This is why 2.5 mmsq is only slightly more expensive than 1.0 mmsq, whereas 6 mm sq is much more expensive ..
    Old Flymo grass cutting mower is cable actually very OK.. I am using it in an installation...its a shocking colour of orange.b.
     
  9. noiseboy72

    noiseboy72
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    Just use some chocolate block to join the cable lengths together. An easy, tidy and transparent fix.
     
  10. BlueWizard

    BlueWizard
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    You don't say what equipment you have (CD, Turntable, Amp, Speakers, ... Brand, Model, Cost)? That can make a difference ... sort of.

    You can extend cable in a variety of ways.

    1.) Wire Nuts - Simply twist a Wire Nut over the wires. This is commonly done in House Electrical Wiring -

    https://www.amazon.co.uk/s?k=wire+nuts&ref=nb_sb_noss_2

    These are color codes relative to the size of the wire. Make sure you get the right Nuts for the size wire you have.

    2.) Solder and Heat Shrink - This would give you the best connection, and would make the most compact joint. But it hinges on your available equipment and soldering skills.

    3.) Wire Butt Connectors - These generally require a Crimping Tool, though common crimping tools are easy to find an reasonably inexpensive. You might even be able to buy a cheap kit that has both the Crimper and a sample of Butt Connectors.

    https://www.amazon.co.uk/s?k=wire+butt+connectors&crid=U9WRDQ87YRO&sprefix=wire+butt+connector,aps,294&ref=nb_sb_ss_i_1_19

    https://www.amazon.co.uk/s?k=wire+connectors+crimping+tool&ref=nb_sb_noss_2

    Something like this would be very economical - Crimper/Connector Kit -

    https://www.amazon.co.uk/Silverline-457054-271-Crimping-Tool/dp/B000WTNFBK/

    Again the Butt Connectors are color coded for the size of wire. These tools and connectors are VERY common and any hardware or building supply store will have them.

    But the best choice is to simply buy longer wire.

    Unless your system is on the very high end, for common consumer system, straight forward OFC Copper wire most commonly 2.5mm² is more than you need.

    Again, unless you have a extremely expensive system, you really don't need more than this -

    https://www.amazon.co.uk/KabelDirekt-speaker-2x2-5mm²-Transparent-polarity-Red-Copper/dp/B01C79Z1FU/

    https://www.amazon.co.uk/KabelDirekt-speaker-2x2-5mm²-Transparent-polarity-copper/dp/B01LFA7MHM/

    In a survey in the USA and in the UK, I found that regardless of system price, a vast majority of people spend about 3% to 5% of their system cost on ALL Wire and Cable. The price of system range from hundreds to 10's of thousand of dollars. (can provide links if you would like)

    In a double insulated round cable, indeed Van Damme Studio Blue is very well regarded, and reasonably price.

    Design-A-Cable - Van Damme Studio Blue - 2.5mm² - £2.80/meter -

    Van Damme Blue Series Passive Speaker Cable

    Banana Plugs if you choose to use them are also very reasonably priced and easy to install -

    Amazon.co.uk: banana plugs

    I typically recommend Sewell Deadbolt Banana Plugs, very easy NO TOOL installation -

    https://www.amazon.co.uk/s?k=sewell+deadbolt+banana+plugs&ref=nb_sb_noss_1

    https://www.amazon.co.uk/Sewell-Direct-SW-29863-2-Deadbolt-2-Pair/dp/B00FF3UN72/

    https://www.amazon.co.uk/Sewell-Direct-SW-29863-6-Deadbolt-6-Pairs/dp/B007QUYQSY/

    Deadbolt Banana plugs


    You do want good speaker wire, but good speaker wire mean 99.99% OFC (oxygen free copper) Copper wire most commonly 2.5mm².

    2.5mm² has a working power capacity of about 2000w and a sustained power capacity of about 400w (from memory, I can provide links if you want). Unless you have 500w/ch to 1000w/ch Amps, you don't need more than 2.5mm².

    Just a few thoughts.

    Steve/bluewizard
     
    Last edited: May 20, 2019

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