Interconnects: solid or hollow core wire?

I love the solid core sound. I've listened to many many IC's and settled on solid core for my system.
JW Audio

Z, Which brand solid core? Compared to what else? How is it different from everything else you've tried?

Z, And are your s-c cables thick or thin gauge?

Pmboyd,
I'll email you to not promote my product.
But to answer your question about the difference.
Sonics are more open and and imaging is pinpoint.
The depth I've been getting is spooky.
Solid core has allowed me to reach the true three dim. soundstage that I've been trying to achieve for years.
I've heard IC's that come close, but the price has always been a factor.

I know what solid core is. I know what stranded is. I do not know what hollow core wire is? Isn't wire by definition solid as even stranded is made up of small solid core? Is there an audio cable that uses metal tubing?