I bought the Pro Snake Speaker Cable to replace the cables that came with my Yamaha StagePas 300 - the quality is far superior.
I play acoustic guitar miked up and connected to a Headway DI then into the PA.
The cable material is tough rubberised plastic and the jacks are top quality and made by Neutrik and made in Lichtenstein.
I compared back-to-back with the cables that came with the PA, the sound quality appeared to be cleaner and punchier. I can't believe Yamaha supply such terrible cables with their PAs, but as always, the cheapest upgrade you can ever do is to replace the cables supplied with the PA.
I gig a lot and have no doubt that they will withstand the abuse of playing in a live situation regularly. Something that is usually very annoying is that cables kink and twist easily when they are repeatedly ravelled and unravelled... not with these: they remain neat and retain their form well.
I am delighted with them - they are very good value for money and I would recommend them to anyone.
As usual, Thomann provided excellent service - the cables are a competitive price and they arrived swiftly and were packed well.