Tvad, you are correct, the input impedence for the DNA-125 is 100K, which wouldn't seem to cause an impedence mismatch. I must have been thinking of the DNA-500, which has a 10K input impedence.
However, the issue could be gain matching, as many tube preamps output a higher voltage than their SS counterparts. I also see that the DNA-125 requires only 1V input to drive full output, that's a relatively low sensitivity. By comparison, the DNA-500 requires 2.25 V for full output.
I could only find output voltage for the Dehavilland Ultraverve, which is 30V.
So a 30V maximum output from a preamp into a amp that only requires 1 volt input for full output could well be overloading the amp. Stick with SS preamps, many good ones have already been recommended.
Cheers,
John
However, the issue could be gain matching, as many tube preamps output a higher voltage than their SS counterparts. I also see that the DNA-125 requires only 1V input to drive full output, that's a relatively low sensitivity. By comparison, the DNA-500 requires 2.25 V for full output.
I could only find output voltage for the Dehavilland Ultraverve, which is 30V.
So a 30V maximum output from a preamp into a amp that only requires 1 volt input for full output could well be overloading the amp. Stick with SS preamps, many good ones have already been recommended.
Cheers,
John