I posted this elsewhere and got no response, so thought i'd try here which seems a more appropriate group, any reccomendations for posting would also be appreciated:
Whilst looking into OFC speaker cables (and finding out that they are really a waste of money) i came across sa few places that claimed OFC copper was less prone to oxidation due to it's oxygen content being practically zero. However i think this is absolute rubbish as the oxidisation is caused by air and water in contact with the surface and has nothing to do with the internal content of oxygen in the actual metal.
Incidentally i believe the real reason for using OFC free is it's slightly lower resistance, but thi s is so small it would only be noticeable over very long distances (over 40M) or where the equivalent copper cable was to thin for the required current. Also note that as speaker wire is normally sheathed and soldered to connectors (or should be) oxidisation is no concern really anyway.
But i'm not really interested in discussing this, i want to know, is there any truth in the comments that OFC doesn't oxidise as bad as normal copper, i can't find anything to substantiate this claim (nor anything disprove it except what i have been taught and learnt from books). If anyone has proof it would appreciated as long as it's from a trustworthy source and not Joe Blogs blog !