Hifi;
I've listened to the Treo CT with ARC
The tweeter is much smoother, and not as sharp.( metal dome like)
I never liked the Treo, but CT is almost a different speaker In my mind.
I knew going In that the et3 with treo would not be right for me.
But,I could compare with ARC preamps
As a side light, has anyone listened the Brackert Rhumba preamp ? that is the same price range as the ET3