Martian, I believe that you're unduly concerned about this, due to reading something about 16 ga not being "good enough" for home theater. Such a statement is nonsense; home theater usage makes no difference in speaker wire requirements. The determining factors are still the length of the run and the impedance of the speakers. As Alan points out, in your usage speaker wire resistance of 0.3 ohms or less would be fine. A 30 foot run of standard 16 ga lamp cord would have a resistance of about 0.24 ohms. Neither 12 ga nor doubled 16 ga is necessary. The only audible effect the lower resistance would be a miniscule increase in volume at the same amplifier setting. The same result would be accomplished by turning the volume control a tiny bit higher. Relax.
