I've bought a few instrument and patch cables from one company over the last year. They're not top of the line, but a decent brand. About two months ago one of the instrument cables crapped out on me at practice. No biggie. Last night two of the patch cables went bad at a gig. Ouch! I brought them home and tested continuity and all of them show less than 3 ohms resistance. I checked sleeve to sleeve and tip to tip. I also checked tip to sleeve to see if there was a short. It all looks good. The patch cables are 6" so there hasn't been any improper coiling. I can't lie and say the same for the instrument cable. I'm doing that correctly now. How else could they be failing?