the great cable day

1] Not enough copper for speaker use

Edited by James Tengo - 20 February 2017 at 3:06pm

Different amp/speaker combinations recomend often conflicting copper requirements.

From an electronic/electrical point of view, 17th ed will give guidance of max current for 240V. This is to stay within acceptable cable temperature rises, and would limit before the insulation fails.

Most amps are not banging out 240v 50hz waves, but not a bad bit of guidance.

The next consideration, again detailed in 17th ed, would be voltage drop. Copper has a resistance inversely proportional to diameter, thicker cross section lower resistance. To get as much power from amp to your speaker, which is nominally 8/4/2.66/2 ohm, you dont want a cable with a high resistance.

If your cable is 8 ohm, and the speaker is 8 ohm, then half of your amplifier's output is lost as a heating effect of your cable.

Beyond these two electrical considerations, you start getting into various degrees of golden eared snake oil bs. Damping factor is the measure of the grip an amplifier has on exactly moving a cone. High damping factor is that the amps output is accurately translated into cone movement. Low damping is the cone can carry on moving in one direction from its own momentum, even though the amplifier is trying to get the cone to go in the opposite direction or be still. High resistance cables dramatically lower actual damping factor, but so too does going from 8 ohm to 4 ohm. Mewh.

Audible? Probably, just, but room acoustic would still be the most prevalent issue to resolve.

10mm 2 core HO7!

And what connector is that going to fit in? 63A Cee form? 63A speakon? Thereby madness lies.

Shaggers will not be happy with 10mm in a 63A, must be 16mm!

In that instance, I think moving the amp rack closer may be cheaper and better all round!

But good demonstration of how silly it can get, just by using a bit of length. I would have used my 100V line stuff.....

apologize for my silence, ive missed the replies!