Definitely research this and exercise some caution, I would advise. I know that member "Gwalt" here upgraded his VAC Ren Sig IIa to SE status, and did not like the change in the preamp's sonic character. He explained to me that the preamp just simply sounded more "solid state-like" than before, losing the hint of beguiling romance that made the original a winner for him. He sold it as a result. FWIW.
I owned the Ren Sig II and was considering such an upgrade, but Gary's experience with the change in character dissuaded me. Such a shift in voicing would not work right in my system.
I owned the Ren Sig II and was considering such an upgrade, but Gary's experience with the change in character dissuaded me. Such a shift in voicing would not work right in my system.