Just got the VB1s today and plugged them in. I noticed an immediate change in the acoustic presentation. Not sure yet if the presentation is better -- just different. At first, I thought the VB1s burned a fog away and I started to really hear the music.
But after re-listening to some familiar CDs, for some reason, it seems as though the mid and low bass was rolled-off, and the midrange was a tad exaggerated. Kinda like when I tried driving my speakers off the amp's 16 ohm output taps a while back.
I am honestly not sure if my ears are simply used to listening to sonic swill. So to be fair to all, I'll do some more listening and will try and have the devices checked out.
I don't know what's inside the little black boxes, but it's passive. I suspect that whatever it is, it must have some combo of capacitive and/or inductive properties.
Be back ....