Odd length speaker cables

Thanks everyone. I spoke to a local dealer who " does not believe in significant difference". He claims that years ago he conducted double blind studies with groups of audio enthusiasts, repeated each test 10 times and less than 20% were able to tell a difference 20% of the time. He moved to a smaller space fiew years back and has a 50 and 30 foot run of silver sonic that he cant use and will part with for a $100. I will pick it up and experiment myself.

Your dealer is wrong.
The better the equipment the more you will notice the difference in the uneven cable length.

Really, IMHO you should go as short as possible.
I think you should rethink your equipment layout and try to make the runs close to the same.

I don't believe 99.9% of people could tell the difference. Granted, its not optimal, (on paper) but, can YOU hear it? In a blind test, I would put my money on no every time.

I experimented with different lengths of cables due to an odd room setup. I obsessed over the issue myself. I could tell no difference with unequal lengths whatsoever. I don't mean any disrespect, but it seems a little far fetched to think anyone can hear difference in microseconds due to unequal lengths of cable.