In my opinion, Sound Lab speakers need a very good match with the amplifier to really come to life and show their potential.That said, it is my belief the optimal choice of preamp is an entirely different issue, one that has more to do with system/room synergy and personal preferences rather than the speakers themselves.As mentioned by others, SL speakers being highly revealing, will show the character and quality of a preamp clearly. Your budget will be a factor. Everything matters. Clean power, vibration control, etc. are also important.