"I'll definitely try bi-amping the Vandys with the Dreadnaught. It's a great suggestion and will be a fun experiment to see if I can hear a difference. Your set-up with the two Ayre V5s sounds like the way to go over the Theta with each channel having its own chassis to improve channel separation."
I wouldn't assume that the V-5's are better than your Theta. Both amps are very popular with Vandersteen. Its just a matter of what you like better. Some people prefer the Theta you have. As far at the biamping goes, its not so much to improve separation as it is to work the amps the same amount as possible. The 2 Ayre's I have are vertically biamped. I use 1 amp for each speaker, not 1 for the highs and 1 for the lows. Using 4 channels of your Theta is basically the same thing. I don't think having the 4 channels in 1 box is anything to be concerned about. The design is what's important.
Most of the time I use an Aesthetix Caplyso. My Wadia 861SE has a volume control, so I can run it direct to the amps, but overall I like having the preamp in the system. I don't like Pass preamps. Pass amps are great but the preamps have no life to them. You shouldn't take my word for it, though. I always recommend listening to any piece of audio equipment before buying it.
The ARC Ref 3, Ayre and Aesthetix preamps are all dead quiet. Its not a factor. I wouldn't worry about it.
I wouldn't assume that the V-5's are better than your Theta. Both amps are very popular with Vandersteen. Its just a matter of what you like better. Some people prefer the Theta you have. As far at the biamping goes, its not so much to improve separation as it is to work the amps the same amount as possible. The 2 Ayre's I have are vertically biamped. I use 1 amp for each speaker, not 1 for the highs and 1 for the lows. Using 4 channels of your Theta is basically the same thing. I don't think having the 4 channels in 1 box is anything to be concerned about. The design is what's important.
Most of the time I use an Aesthetix Caplyso. My Wadia 861SE has a volume control, so I can run it direct to the amps, but overall I like having the preamp in the system. I don't like Pass preamps. Pass amps are great but the preamps have no life to them. You shouldn't take my word for it, though. I always recommend listening to any piece of audio equipment before buying it.
The ARC Ref 3, Ayre and Aesthetix preamps are all dead quiet. Its not a factor. I wouldn't worry about it.