I have heard it. It is nothing special sound wise in terms of comparisons to other resistive passives. Better build and quality of parts though IMO versus other resistive and even most magnetic passives. Especially if you can find one with the Shallco attenuators. I guess at the used prices they have been selling for lately one could do a lot worse.
At the time I did comparisons with the First Sound I was still convinced my TVC was better. It would be interesting to compare one to my autoformer and LSA.
At the time I did comparisons with the First Sound I was still convinced my TVC was better. It would be interesting to compare one to my autoformer and LSA.