Tom
I installed the 17.5 guage chassis wire to the tweeters Sunday
and my conclusion is this is the correct size to use .
While the 15.5 guage sounded very good there was a glaring issue ,
on loud higher frequency notes distortion appeared .
This was first noticed when listning to the War album Deliver The Word
when an alto sax hit the high notes , I then checked with the album that I use for testing when changes are made Norah Jones Come Away With Me , some of her piano notes caused the same ear bending distortion as heard on the War album and finally the worst offender of all listening to Freewheelin Bob Dylan album , his harmonica playing convinced me to try changing in wire gauge .
The 17.5 sound smooth and sweet , all the notes that were distorted before now sound detailed and clear , even Bob Dylans harmonica playing or to say at least as good as his playing gets .
If I do any other wire changes it will be to increase the gauge to the bass crossover board but for now it's time to listen to the music for a while before I start installing the Mills the resistors .
Rob