supratek chardonnay with Pass x250

Since Pass X250 input impedance is rather low (especially unbalanced) i'm trying to carefully match it with a tube pre. I could not find the output impedance figure of the Chardonnay and wonder if someone can asist with it and also with thoughts on this match. Thanks
Output Z of the Chardonnay is 600 ohms! The same is true for the Syra and Chenin(I have one) as well. Your amp has 22K of input Z (unbalance). Should be fine IMO.
Have mine with the X150. Best combo I have found. I tried many other preamps with the Pass Labs. I like the Supratek best.