I certainly agree that the NuForce amps are very transparent; the most transparent that I have ever heard in fact. In my opinion its a strength rather then a weakness however.
Find a preamp that you like and the Ref 9s will pass its sound. I've never used a SS pre with the amps and do not think it would be to my liking. Way too much of a good thing (clinical).
My Cary SLP-98 leans a bit (ok quite a bit) to the romantic side but I never find it syrupy or slow. I have tried it with different amps which always seem to slow the system down and again give too much of a good thing to my ear (leaning further to the warm side this time).
I guess what I'm trying to say is that in my experience these amps make component matching much simpler. The pre-amp/amp interaction is minimal.. so just pick the pre that you like and run it through the Ref 9s - you will receive a larger version of it on the other side.
There are many ways to arrive at the sound you want but this is my experience with these amps.
Find a preamp that you like and the Ref 9s will pass its sound. I've never used a SS pre with the amps and do not think it would be to my liking. Way too much of a good thing (clinical).
My Cary SLP-98 leans a bit (ok quite a bit) to the romantic side but I never find it syrupy or slow. I have tried it with different amps which always seem to slow the system down and again give too much of a good thing to my ear (leaning further to the warm side this time).
I guess what I'm trying to say is that in my experience these amps make component matching much simpler. The pre-amp/amp interaction is minimal.. so just pick the pre that you like and run it through the Ref 9s - you will receive a larger version of it on the other side.
There are many ways to arrive at the sound you want but this is my experience with these amps.