Magnet Wire Question


I've decided to try some magnet wire as speaker cable. I'd appreciate some help.

Is 18 ga heavy enough for a 10' run?

Do I twist two lengths and use one of the twisted leads for positive and one for negative? Or do I need to keep the legs separated with painters tape or something similar?

Any other info would be appreciated!

Thanks in advance,

Gary
uncledemp
Rax, thanks, they are enamel coated, thankfully. I read about spacing runs in a thread- may have bi wiring based comment.

Al, the speakers are Usher CP6311. (87 sens and a nominal 8 ohm load)

If thicker gauge would be better, I'll buy it. What gauge do you recommend to insure I give the magnet wire a fair shot?

Also, I heard a suggestion to use an electric drill to twist the wires. Is that the best way you know of?

Thanks guys, I appreciate the help. I tried some solid core in a woven jacket and it opened the sound up over the stranded I had in place. Curious what the minimal coated magnet wire will sound like. I tend to prefer lean over thick sound.

Best-
Gary
I couldn't find an impedance curve on the CP6311, but I suspect that its impedance in the top octave either rises to relatively high values, or at least doesn't decrease significantly below the nominal 8 ohm spec. So inductance is probably not all that critical. I'd suggest simply twisting the two conductors together by hand, with three or so twists per foot, and not messing with a drill.

I wouldn't be surprised, though, if the impedance dropped to the vicinity of 4 ohms or so at some frequencies in the bass or mid-bass region, which would tend to increase the importance of having adequate gauge. The resistance of the 20 foot combined length of the two conductors, if they were 18 gauge, would be 0.128 ohms, as can be calculated from this wire gauge table. For frequencies at which the speaker impedance may be in the vicinity of 4 ohms that would reduce your damping factor to 4/0.128 = 31, even if the damping factor of the amplifier were infinite. It could be argued that 31 is more than adequate for this and most speakers, but my instinct would be to increase that somewhat, by going to either 16 or 14 gauge. Those gauges would increase the corresponding damping factor (assuming the amplifier's damping factor is much higher, as it would be for most solid state amps but not for most tube amps) to 50 and 79 respectively.

Enjoy! Regards,
-- Al
Al,

Thanks for the info. Way over my head, but I get the idea.

I'll go with 16ga and make a jumper with a length of the same wire.

Looking forward to giving it a whirl-

Kind regards,

Gary
I have to agree with Don c55. Why bother making those yourself when Anti-Cables are available so readily and cheaply? Plus, if you don't care for the sound of them, Anti-Cables will at least have some residual resale value.