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Power loss over speaker cable "in the real world"


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Hi all


Just how much of a problem in the real world is power loss over speaker cable in high power systems?


With my rig (9.6kW) I decided to split the amp racks left and right so as to only run short 3m cables to the stacks.


Its a bit of pain at times and would be neater to keep all the amps on one side of the stage but I've always stuck to my guns that its better to use a slightly smaller cross section cable (they coil better are lighter and cheaper), keep the cable length short and live with a rack either side that just needs mains run to it.


I know some people will put their amps way back and run really quite considerable lengths of cable to their speakers but a bit of schoolboy ohm's law makes me skeptical.


What are your thoughts?



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I once replaced some 50m x 0.75mm^2 speaker leads with 50m x 2.5mm^2 and on the next event all the tweeters popped out because the clowns had set the knobs at the same point, not realising that it would be more powerful.


IMO as long as the cables are well less resistance than the speaker impedence, there should be little drop in loudness, BUT bass bins could be soft and flappy as the damping factor plummets to zero.

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I once replaced some 50m x 0.75mm^2 speaker leads (...)

What ???? I don't even use .75mm^2 for speakers at home, this is waaaaaaay to small... If you have a good cable manufacturer you can get numbers on resistance and capacitance per meter of cable and acceptable current. if you do the math (well physics actually), you will realise that some cables are actually really good low pass filters. :)


[edit] apparently there are some online calculators for that nowadays : http://www.sengpielaudio.com/calculator-cable.htm

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