I bought the Sony HT-IV300 home theatre system 3 years back.

Specifications ( Impedance levels are mentioned)

For the front speakers, just used the default surrounding speaker wires ( impedance of front = surrounding = 3 ohm), so no worries about them.

I would like to install the surrounding(rear) speakers of 3-ohm impedance on the walls. The wires are concealed. So, I need to buy the wires to extend up to 30 feet for each speaker.

Online references/readings lead to confusion as everyone stands on their own standard.

  1. Can you guys help me to buy the right wire with right AWG and with a wire gauge chart for distances vs ohm ?

  2. Shall I simply buy 14 gauge wire without thinking too much technical?

  3. As the wires are concealed, should i think of oxygen free copper wires?

Am i really thinking too much?

1 Answer 1


I would just install 14 gauge wire, it will be more than adequate at 30 feet.

Look for a reputable brand that's made for audio and rated CL2 for in-wall installation. Any decent speaker wire will be made with fine strands and sufficient purity for your surround system.

You can spend a lot more on speaker wire, but you won't hear any difference.

  • 1
    In college, I once ran double twisted pair from my dorm window to the courtyard, 100'+ away, to drive a pair of speakers from my stereo. The twisted pair was no heavier than 20 gauge, and probably thinner. Sounded fine to me; even if I had (have?) a tin ear, that means 14 gauge will satisfy any audiophile for at least hundreds of feet. Nov 26, 2018 at 19:22
  • Agreed, copper audio grade, but IF you are going to upgrade to better speakers in the future you may want to put in 12AWG now so you are prepared. I would go with 12 regardless.
    – Alaska Man
    Nov 26, 2018 at 21:27
  • At 30' I don't think 12awg will sound any better than 14awg. Nov 26, 2018 at 23:24

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