I use to use a Rowland Synergy IIi preamp with my Lamm M1.1 ... Awesome remote control! Now I'm using a Theta Gen VIII which is just as awesome plus it's my DAC and I can run without one less $$$$ cable! I used a Placette and a CJ Premier 14 also but had Gain problems because they didn't have enough volume increments. Too loud for low level listening. So be careful of preamp matching the Lamm's.