Shielded Speaker Wire 12AWG

Vh audio has cryoed wire

And analysis plushas very good awg wire 

 Shielded is not as important

I have  a 4 wire setup a common ground 

And a insulated isolated ground on its own buzz bar to the outside 

Everyday is the same No noise no sharing ground with other appliances 

My Audiophile friend electrician taught me this and breakers are silver over copper 

From Germany this ovoids the copper from oxydizing

Hey OP

you wrote you wanted "connect the speakers with shielded 12awg wire, "

I don't suggest you do that. As per the video, shielding affects the dynamics of sound because of the signals going to the speaker are higher voltage/current swings. just use good speaker cable

Shielding speaker cable adds capacitance, which acts as a 6dB/Oct low-pass filter. The longer the cable, the greater the capacitance, and the lower the frequency at which the low-pass cutoff frequency occurs.

Speaker level signals are much higher level than line level. like 20 or more dB, and so much less subject to audible effects. Twisting the wire results in equal noise pickup in both wires, which is cancelled at line level by the common mode rejection of the terminating end input. Balanced line feeds excel at cancelling this because noise is induced equally in both halves - Common Mode - and is measured by calculating the Rejection Ratio. Put together you have the CMRR. No such capability exists in a speaker, so twisting does nothing meaningful at speaker level.

The bottom line is using high quality bulk unshielded 12 ga. speaker wire for home theater runs of 25 ft is perfectly adequate. Here is one source: https://www.gearit.com/products/gearit-12-gauge-speaker-wire-cl2-rated-in-wall-ofc-oxygen-free-copper-cable-99-7-home-theatre-car-speakers-more-12-awg-pro-series-cl2?variant=30330652622957