I had a Rogue 66 in my system many years ago when they had just been introduced. As I recall, the 66 sounded pretty well focused but had PHAT bouncy bass which was not too articulate. And overall the sound was not very dimensional.
One thing to consider when using a tube preamp is that many of them invert polarity... so for any comparison to be fair, you need to make sure you have the polarity correct at the speakers. This sometimes means reversing the positive and negative speaker leads on both channels. This will result in a "different" sounding presentation.
I don't remember if the Rogue inverts, but I'm sure you could contact the company and find that out easily.
As a side note, I found the sound of their model 99 tube preamp to be much more to my liking.
Cheers!
One thing to consider when using a tube preamp is that many of them invert polarity... so for any comparison to be fair, you need to make sure you have the polarity correct at the speakers. This sometimes means reversing the positive and negative speaker leads on both channels. This will result in a "different" sounding presentation.
I don't remember if the Rogue inverts, but I'm sure you could contact the company and find that out easily.
As a side note, I found the sound of their model 99 tube preamp to be much more to my liking.
Cheers!