Hi
It could be break in you know. There are posts on Audio Asylum specifically mentioning break in for the Contour S3.4, with the poster saying that it needs at least 100 hours otherwise the treble is bright.
I am not a whiz with posting links otherwise I would have posted the link for you.
I'd say a tube pre would help with Krell stuff but you may need to be careful with impedance matching.
It could be break in you know. There are posts on Audio Asylum specifically mentioning break in for the Contour S3.4, with the poster saying that it needs at least 100 hours otherwise the treble is bright.
I am not a whiz with posting links otherwise I would have posted the link for you.
I'd say a tube pre would help with Krell stuff but you may need to be careful with impedance matching.