I own the preamp, first off it is the best pre I have ever owned just does everything right. I have the Phi 110/110 amp and I'm very happy with there performance.From the Renaissance Signature Pre Mk II manual " The line stage is, in effect a small class A1 power ampllifier, capable of driving loads as low as a few hundred ohms. This is a stark contrast to normal preamplifiers, which claim a low output impedance but completely collapse when asked to deliver current. The Renaissance Signature circuit is loafing with a normal load in the 10,000 to 200,000 ohm range, delivering an effortless, musical performance." The pre is also built like a tank totally quiet and if you get one with a phono stage you are set for life.