I use the Supra 3.4W which is a compressed version of the standard 3.4 without the shielding (you can get the standard 3.4 either way). It's inductance is .05 lower than the standard 3.4 but I don't know if it's easily discernible between the two while listening. Looking at it crosscut you'd think, at first, it was copper foil, one run atop the other. It came out in 2014 so there's not much in the way of reviews out there that I could find.
All I know is it sounds very good and is more coherent across the board and betters the Supra 2.5 which I also have.
All the best,
Nonoise
All I know is it sounds very good and is more coherent across the board and betters the Supra 2.5 which I also have.
All the best,
Nonoise