Impedance matching with tube amp


I have a Mccormack DNA 0.5 which has an input impedance of 100kohm. I'd like to get the Schiit Saga preamp, which has an output impedance of 180 ohms. Now, I've read about the 10:1-100:1 ratio of input:output impedance for power amps and preamps, so this wouldn't quite fit that range of ratios. Would this still be a good option, and if not, what other (<$500) tube preamp options do I have?

Thanks!
muffinhead123

Showing 2 responses by muffinhead123

@bdp24 So you're saying that the nominal impedance is a measurement of output impedance at some chosen reference frequency? Is it typical for there to be large enough fluctuations in impedance across the frequency spectrum so that problems occur? From what others have said, I feel like the large input impedance coefficient of the power amp provides me with a lot of headroom to tolerate preamp output variations, but maybe I'm wrong.