all is needed here is a preamp with fine volume stepsThe issue is one of overall gain, not fine adjustment. As Tboooe states:
When I increase the volume knob just a tiny bit, the volume is VERY loud.An attenuator is a non-intrusive fix for the problem, one that will still permit the signature of the Einstein to be heard. Having the gain reduced on the Einstein is an even purer solution, especially if you intend to keep it. Based upon your other thread, it sounds like you may be giving up on the Einstein due to the gain issue. If that is the case, you will have never heard what this preamp can do.
Just my two cents, before I drink myself silly tonight...on hot tea.