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do ya think there is any significant degration of the sound if i was to move backwards from 6 feet SC4 to a set that would be 3 meters long thus closer to 10 feet
I'm guessing some might say yes there is but not that it would really be audible ...
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Do yourself a favor and quit believing all the nonsense you read here about speaker cables making that much of a difference. Particularly since you already are using 12ga cables that have a resistance of only 0.001588 ohms per foot.
The difference of four feet you mentioned represents an increase of 0.006352 ohms, which is of zero significance in the total speaker circuit. Likewise, the increase in capacitance and inductance of the extra four feet is totally inconsequential.
There will be absolutely no degradation of the sound from the extra four feet of cable, and anyone that tells you there would be does not understand electrical circuits.
Here is a link to some experts who debunk a lot of the snake oil that is propagated by the cable companies:
https://www.audioholics.com/audio-video-cables/speaker-cable-length-differences-do-they-matterSo go ahead and use the cables that you have any way you want, enjoy the music, and don’t spend even a second worrying about it. If you do, you’ll miss out on the enjoyment.