Here we have a custom 8 String Concert guitar from Thomas Rodriguez. This guitar is crafted to the highest standards using beautiful Indian Rosewood and Spruce. The Gilbert tuners insure perfect accuracy on all strings. The current setup is for 2 low bass strings below standard tuning on the top 6 strings. So you can tune the low strings to C and D offering two notes below standard for bass notes or experiment using many other possibilities. This is an extraordinary instrument that allows the player to arrange and perform unique inversions and wonderful bass movements not possible on the standard six string guitar.
There's a good article about Thomas Rodriguez at Virtual Woodshed
Check out videos of Andrew McEvoy playing Thomas Rodriguez guitars:
Bach BWV 995 - Leyenda
Here we have a custom 8 String Concert guitar from Thomas Rodriguez. This guitar is crafted to the highest standards using beautiful Indian Rosewood and Spruce. The Gilbert tuners insure perfect accuracy on all strings. The current setup is for 2 ...read full description
"Thomas Rodriguez is an exceptional luthier and this custom 8 string offers an array of possibilities to the modern player. The bass strings can be setup and tuned a variety of ways offering wonderful exploration for arrangements and performance with a much wider range than standard guitar. The construction is beautiful as is the tone, making this a rare and special guitar." - Paul Heumiller
"Not having any experience with this tuning, I spent most of my time with this guitar just getting to know it. I found that it was very easy to finger and play left hand notes once the width of the neck was understood a bit more. I can imagine lots of great things that could be done. I like having the low strings tuned in whole steps somewhat like a harp guitar. The tuning used here is CDEADGBE." - Al Petteway