I have ordered a Khartago Stereo Extreme amp a few weeks ago. There is a 8-9 week wait for the amp to be made, so I have been spending this time looking at preamps. I really like the PrimaLuna Prologue Premium Preamp. I want a tube preamp to give my system a more warm sound with my new Tekton Double Impact speakers. The issue I see is on the specs on the PrimaLuna preamp it states: ProLogue Premium is 2800 ohms: Amplifier Input Impedance needs to be 28k ohms or higher. On the Odessy Audio website, the specs show the Khartago Amp as: Input impedance 22K ohms. Has anyone ran into this with matching the Odessy amp with a preamp? I have looked at Audio Rogue, Schiit, Jolida, and Wyred4sound (not a tube but supposedly has the warmth of one). I really like the PrimaLuna better than any others I have looked at. Thanks.