SS amp with tight deep bass ?

Thanks Al. Geesh, You'd think the manufacturer would update their own website, as it is kind of important.

That EE pre has a whoppingly high output impedance. I don't know if they are the only ones, but the only ss amps that come to my mind, that have an appropriately high input impedance that might work your chosen pre., are some of the Electrocompaniets.

Eastern Electric's web site indicates 1.5 KOhms:
http://eeaudio.com/eeaudio_013.htm