Soeaker cables technologic dilema…

@faustuss 

"You could argue that lower inductance is a good thing and capacitance doesn't matter anyway."

Yes, in speaker cables, low induction and resistance are desirable and capacitance matters little until it becomes so high as to affect amplifier stability.  That is why Alpha Core Goertz used to offer Zobel Networks with their speaker cables when they were going to be used over a length of 10Ft or with OTL amps.

Regarding geometry, the cross-connected star-quad will have lower inductance than the twisted pair, but either should work fine from that perspective. The cross-connected star-quad should also have lower resistance due to the larger aggregate gauge of wire.  I would not recommend using the star-quad cable as an internally bi-wired cable.  I would use two separate runs of cable if bi-wiring, regardless of which form of the cable you choose.,

Regarding screening or shielding, one example of a company that uses it for home audio speaker cables is Supra Cables from Sweden.  Here is the datasheet for their top speaker cable.  This explains that the shield pigtail is to be connected to a ground terminal on the amplifier, or maybe a screw in the metal amplifier casing.  They do NOT recommended connecting it to the minus speaker wire terminal.  The purpose of the shield is to "provide an additional path for electromagnetic interference (EMI) and radio frequency (RF) interference (RFI) to dissipate, potentially reducing hum or buzz."

@milimetr - run them as a twisted pair or cross-connected quad - that is why they design them that way.

I never used them but the parallel ribbon configuration resulted in quite low inductance.  Many liked them back in the day.

BTW, the Neotech NES-3003G cable you pictured is not the same as the NES-3003 Mk II you reference in your most recent post, so be careful to understand which you are purchasing.  The pictured NES-3003G does not use silver plated OCC wire, it uses G-upocc graphene copper in a different winding configuration than the Mk II version. I would personally go for the newer G version as I find silver-plated copper can display a touch of sibilance IMHO. 

From Generative AI:

"Neotech’s G-UPOCC (Graphene-Ultra Pure Oligo Crystalline Copper) refers to a type of high-purity copper conductor that is combined with graphene. This composite material is designed to improve electrical signal transmission and stability, particularly at high temperatures and voltages."

To the question posed by @curiousjim - the optimal method to construct the NES-3003G cable would be to cross-connect the two wires opposite each other to feed a single pole (i.e., 2 wires oposite each other are connected together and go to + and the other 2 wires opposite each other go to -).  As in the NES-3005G cable, the individual wire gauge is 13awg per single wire.  When you double the same gauge wire, you jump three gauges lower (i.e., the lower the gauge the larger the area).  So, in the NES-3003G, they are considering the construction will include connecting two 13 awg wires together to equal one 10 awg conductor, which is the specified wire gauge they list for NES-3003G. 

The NES3004 with 8 wires looks interesting to me.  By cross-connecting four wires (i.e., the blacks together and the reds together) you get an aggregate 11 awg cable.  However, I don't care for the PVC insulation on any of them.  If you go a model up to the NES-3002G, you get polypropylene insulation, which is just behind my favorite, polyethylene.  BTW, the 3002 wire is almost the exact construction of Harmonic Technology Pro 9 speaker cable.  

@milimetr - Not clear if you are talking about a double run of the 3005 in a bi-wire configuration where one pair goes to the MF/HF posts and one pair to the LF posts, or two separate runs with both wires inside of one jacket going to one polarity (i.e., + or -).

The only reason I would do a double run as described above would be to bring a larger wire gauge to the LF posts in a bi-wire configuration since connecting both wires in one jacket to a single pole would result in losing all the noise cancelling benefits of having twisted wires. 

@asvjerry - As discussed on the Supra Cable site, the screen shield in a speaker cable would most effectively be grounded to the amplifier chassis, or maybe to a univeral ground box. The negative pole at the amplifier would be a last choice.  From Supra Cables:

Earth/Screen connection. The earth conductor should be connected in the source end only (amplifier side) to:

1. Earth terminal at the amp (if available)
2. Connect to any of the amp chassis screws.
3. Negative speaker out terminal