The best speaker you ever heard?

Duntech always touted that the Sovereign and Princess could accurately reproduce a square wave, and had the graphs to back up the claim. I believe they are still in production, though I have not checked their website for a while. Dunlavy as well, as was noted above, though they are no longer in production, sadly. I'd be curious if other speaker manufacturers make this claim.

Dunlavey used to be with Duntech , prior to starting his own speaker brand.

I think it was Duntech as set up in Australia with government support. When that support was lost, John moved to Utah and got government support there, becoming Dunlavey. I do know that Duntech for a while continued the Sovereign under a different name. I don't think either company still exists. John died in 2007.

Sometime in the mid 1990s I met with John Dunlavy at his factory in Colorado Springs. To the best of my knowledge, they were never located in Utah.

The Duntech Sovereigns in there time were very good speakers, top tier.