Heard of Soltanus Acoustics ESL Virtuoso ?

Greetings, I review for Dagogo.com, and am fairly familiar with ESL products in North America. I have a technical question about the descriptions of the speaker gleaned from your post and the Six Moons article:

How can this be a crossover-less design and incorporate a tweeter bias function? Why would there be discussion of a tweeter adjustment if there is no crossover? How would one separate out the function of the tweeter for adjustment if there is no crossover?

The article includes this sentence, "The high-frequency panel measures 120x14cm and is designed to cover 200-20'000Hz," which seems to definitively show that it is not a crossover-less speaker.

Even if not crossover-less, it does have a couple features not normally found on ESL speakers. The impedance matching seems to be a significant feature.

Ok, I did some more investigating on the Soltanus site. It seems they're simply running both panel sets flat out and letting them merge without a crossover. Correct?

Or, perhaps more accurately, they are running both the driver sets with independent attenuation. Would that be an accurate description of the technology employed? The flexibility would be marvelous, but I would think it also could mean if the driver sets were adjusted poorly, the performance would suffer accordingly.

I do, however, like the fact that each owner could blend the driver sets' performance to one's pleasure. The Legacy Audio Whisper DSW (reviewed for Dagogo.com) has a high degree of flexibility in contouring the driver groups between Bass, Midrange and Treble. If the owner is careless, the sound can be harmed, but, OTOH if the owner is deft, the performance can be tuned to the extreme. I would expect that Soltanus is expecting owners to cook up their own combination to suit their taste, and if it's not all that perfect performance-wise, it will still be the "best" for that owner.

It's not a bad idea, for there usually is little adaptation for ESL speakers.

Brooklynaudio, thank you very much for explaining in further detail the nuances of the crossover-less design of the speaker. It seems quite an interesting design!

Brooklynaudio, I surely wish I could; I have a fair amount of international travel annually, which limits the shows I can attend. I will plan on being at AXPONA, Chicago, however. If you would make it there, I would welcome a personal introduction to the speaker line.