Nice amp you got there. There's one in my living room, too.
I haven't experienced what you describe during break-in, so can't make any suggestions on that topic.
However, I do have some experience in designing speakers to work well with the S-30 (as well as with other amps, but the S-30 drove the design). In my experience the speaker's impedance curve is a very significant factor.
I don't know what the impedance curve on the Tannoy Edinburghs looks like, but if it has a significant peak or two in the upper midrange or treble region the S-30 would put out increased power into that peak, especially relative to what a solid state amp would put out. And increased energy in the upper midrange and treble region can come across as "hardness".
Duke
dealer/manufacturer
I haven't experienced what you describe during break-in, so can't make any suggestions on that topic.
However, I do have some experience in designing speakers to work well with the S-30 (as well as with other amps, but the S-30 drove the design). In my experience the speaker's impedance curve is a very significant factor.
I don't know what the impedance curve on the Tannoy Edinburghs looks like, but if it has a significant peak or two in the upper midrange or treble region the S-30 would put out increased power into that peak, especially relative to what a solid state amp would put out. And increased energy in the upper midrange and treble region can come across as "hardness".
Duke
dealer/manufacturer