It says the cable is made from solid, rather than stranded cores which won't comply with the electrical regulations in most countries which is dangerous and shouldn't be sold.
I actually haven't seen this in any codes UL, CE, NEC, CSA.. Can you elaborate what you are citing?
No, I don't have a citing, as the standards are all payware. There's a reference to it in the portable appliance testing (PAT) standard but I don't have it with me ant the moment. I believe it'll probably be somewhere in BS EN 50525.
http://shop.bsigroup.com/ProductDetail/?pid=000000000030188772Solid core wire is not allowed for portable appliances because the conductors can't be bent many times before braking, due to metal fatigue. All portable appliances must have flexible cables, with conductors consisting of many strands of fine wire.
If saw one of those silly solid core audio cables at work, I'd put it quarantine and even consider destroying it so it can't be used.