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Matching tube preamp to ss amp

First time of venturing into tubes and i'm a little confused on impedance matching, the pre amp is a Prima Luna Evo 100 with an output of 2800 ohms and the amp is a Nad 220 that I just had recapped with an input of 25Kohm It seems like it might not be the best match, which is why I'm putting this out to you folks that have far more knowledge, and I would like to know better before purchasing the preamp.
oldgzzrr

Showing 2 responses by jjss49

jjss49's avatar
jjss49
6,612 posts
 
pmm is correct

conrad johnson tube pre's for instance, have for years made their low output impedance an important selling point

cj premier 16ls2 is <700 ohms
cj et5 is 100 ohms
jjss49's avatar
jjss49
6,612 posts
 
rule of thumb is 10x - so you shd be fine

u can do better than a nad though...
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