More-likely it will match impedances and the only thing left to check is the input sencitivity that should be smaller than source component output.
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I have a Bent Audio passive preamp (transformer volume control) between my CD player and my tube amps, and I could not be happier. The passive sounds better than the two tubed preamps that I was using previously. I believe you'll need to verify that the impedances between the units are compatible.