Solid core OFC vs stranded OCC copper

Litz is the way to go. Cardas, Zavfino, LessLoss all use this design and process and make quality products, Zavfino is more reasonable in pricing. 

Neotech makes OCC up to 12 awg both solid and stranded ,

so why would you want solid OFC ? 

I think that from practical point 12 AWG solid core Is thick and not flexible to work with and to use. Also, for bass I like to have 11 AWG

I fear that 12 AWG solid core will be hard to bend

I am not sure though how flexible would be 8 x 20 AWG or 5 x 18 AWG

there Is a reason that some brands use smaller multi solid cores In their speaker cables

@sasho - if each strand is insulated - the problem with running parallel strands of wire is that you increase the capacitance of the finished cable - much like Kimber Kables products, which have a relatively high capacitance compared to many other brands.

Some systems do not like the higher capacitance, whereas other systems are not bothered by it.

But it can be an expensive lesson to learn

You can run 2 x 16 gauge or 2 x 14 gauge wires without loosing too much flexibility

I run 2 x 14 gauge solid bare wires, where each wire is inside it’s own teflon tube that has a larger inside diameter then the diameter of the wire.

• Using a Teflon tube for insulation actually reduces the capacitance because the insulation is only ever in contact with a very small percentage of the surface area of the actual wire
  • because the tube does not collapse around the wire, like cotton or silk, it creates a tiny layer of.air between the wire and the teflon tube
  • for wires that have a moulded teflon insulation the contact area between the wire and the insulation is close to 100%
• This approach results in a very low Dielectric Constant (DK)

e.g.

• Teflon’s DK is 2.2
• Foamed Teflon has a value of 1.45
• Silk and cotton is 1.3
• air is 1.1 and a vacuum is 1.0

Lowering the DK improves clarity and details and as a result, the image is far more realistic.

I use solid wire because trying to accomplish this with a stranded wire is extremely difficult, but unfortunately it does make for a stiffer cable, so I use a stranded wire for the neutral, which provides some flexibility and assists ia a more natural curve to the finished cable,

Hope that helps

Steve,

greetings and thanks for support

Would you please take a look at Neotech NES 3002 2 x 9 AWG speaker cable

It uses 19 Individual solid core strands with pvc Insulation per single conductor

there are reports It Is very good sounding cable 

do you have experience with that cable compared to your Helix cable

what Is you first and second choice to date for solid core OCC hook Up wire