Duelund appear to have recently released a new hookup wire. At 10GA it is their thickest yet, and claims to offer the fullest and richest sound.
As someone who has experimented with their existing 12GA and 16GA I thought I would give it a go as speaker cable. My system is great with the 12GA, though could still benefit a little from a fuller, warmer sound.
Based on early impressions I can confirm it offers much of the 12GA, just more. Fuller and more dynamic bass being the obvious one. Vocals feel to me more natural too - less hard. There is certainly no danger of it being too warm or dull.
Duelund wires normally take a while to burn-in, so I'll hold back on a final opinion for a while. However, anyone finding their system too bright would do well to try some.