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Ideal copper wire
Ideal copper wire
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Old 22nd November 2017, 07:13 PM   #11
jvhb is offline jvhb  Europe
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Short answer:
Solid wire works fine, but it is not practical to use such a stiff cable.
Just use normal stranded copper cable of 2,5 or 1,5mm2. Like this type: Cordial CLS 215 - Thomann UK

There is no advantage to be had by using expensive or special speaker cables.

Edit: good tight connections at the amplifier and loudspeakers are more important than the type of cable. Loose connections = problems.
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Last edited by jvhb; 22nd November 2017 at 07:16 PM.
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Old 23rd November 2017, 11:31 AM   #12
DF96 is offline DF96  England
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Speaker wire needs to be thick and closely-spaced. Not too thick to get into the terminals. In most cases it needs to have some flexibility, which probably means stranded rather than solid. It doesn't need to be anything other than copper. It doesn't need to be anything other than fairly cheap. It doesn't have to be woven - in fact this could be a disadvantage. Low resistance and closely-spaced are the only requirements.
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Old 23rd November 2017, 03:23 PM   #13
john_ellis is offline john_ellis  United Kingdom
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Re post #9 - yes, it is no good if stranded wire breaks and only leaves a few strands to make the connection. Be careful when stripping the plastic not to break any wires. You can get some cheap stripping tools that reduce the risk. I have known thick wire to become nicked and then break, too.
The most important points are that the wire resistance needs to be "low enough" and the connections between the amp and speaker nice and solid. "Low enough" does depend on the length of cable, but I would suggest that for an 8 ohm speaker, 0.1 ohms max. would be fine. If the impedance drops to 4 ohms that is still only a loss of 0.2dB.
1mm2 wire (32/0.2=32 strands 0.2mm dia) (6A rating) stranded would be ideal, and at 1.5 meters only 24 milliohms per length.
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Old 23rd November 2017, 04:20 PM   #14
Joanito is offline Joanito  Portugal
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Ok, thanks.
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Old 27th November 2017, 07:11 PM   #15
70s Veteran is offline 70s Veteran
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Use normal 15 Amp mains wire.The advantage of using a 3 core cable is that the mids / treble speakers can be wired separately from the woofer.
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Old 27th November 2017, 07:38 PM   #16
scottjoplin is offline scottjoplin  Wales
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Any thoughts on using the twisted fabric covered lighting flex?
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Old 28th November 2017, 02:06 PM   #17
Speedskater is offline Speedskater  United States
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Quote:
Originally Posted by 70s Veteran View Post
Use normal 15 Amp mains wire.The advantage of using a 3 core cable is that the mids / treble speakers can be wired separately from the woofer.
That would require a 4 core cable and any advantage is questionable.

Each signal requires 2 conductors, with a 3 core cable you have to share a core.
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Old 28th November 2017, 02:32 PM   #18
70s Veteran is offline 70s Veteran
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Hi Kevin, you are incorrect.
If you speaker - ve terminal is common then use it for 0 volts or earth (green / yellow wire).
The woofer can be connected to Brown wire (live).
The mid / treble to the Blue wire (neutral).
At the amplifier connect the Brown and Blue wires together and connect to the red speaker terminal +'ve.
Idea by no wiring a speaker is the the high current woofer waveform does not interfere with the lower current mid / treble speakers.
This does not apply to amplifiers. Like some bridge amplifiers.
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Old 28th November 2017, 02:40 PM   #19
scottjoplin is offline scottjoplin  Wales
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The 0V is shared so there is no advantage
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Old 28th November 2017, 06:28 PM   #20
DF96 is offline DF96  England
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Wire is linear, to a very high degree of approximation. Hence the wire does not mind sharing both woofer and tweeter currents; there is no interference.

What can happen with bi-wiring is a small dip in response near the crossover frequency. This is because at the crossover frequency the phase of the woofer and tweeter currents are such that the vector sum of the two can be smaller than the arithmetic sum, so bi-wiring gives more voltage drop than simply putting the two wires in parallel. This may or may be audible; it may or may not be an improvement, depending on whether the existing system had a small peak near the crossover frequency.
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