Review on 🔌 GS Power 100% Copper 10 AWG OFC Wire - 25 FT Red & 25 FT Black Bonded Zip Cable for Car Audio Primary Remote Automotive Trailer Harness Wiring (Also available in 6 & 8 AWG) by Deron Altman

I'm not sure why "training" is the best option but the sheath is nice and thick so I'm sure you could jump rope if you wanted to! Jokes aside, if you use it to power a JL w7 at 750W RMS, it works perfectly. As flexible as an OFC should be, the rubber sleeve is nice and thick. Good wire and just over $1 a foot, that's a good deal. My only issue is that I thought 10g would be a bit thicker, it's pretty close to 12g so I will order 8g in future.