Speaker Gauge Wire for SA-12

[Bobbytwonames 5,000+ posts]

Should I go with 10 or 8 gauge?

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[n2audio 5,000+ posts]

Just like power wire -- depends on current (sqrt(ohms*watts)) and length. Although sub wire is usually short so it's not much of a factor.

This calculator is handy: http://www.bcae1.com/images/swfs/speakerwireselectorassistant.swf

If you're running rated power (750) at 2 ohms and a short distance 12 awg would be adequate.
But If you're running at 1 ohm it would drop you to 8 "ideally".

Also keep in mind -- the power rating of your amp is rarely, if ever what the sub will actually, so a size smaller would not cause any problems. You'd have no losses with 10 awg at 1 ohm.