etc wrote:I'm in the process of building the Eiclones which is my first project. Does the tubes for both mono blocks have to match? Do I need to get a quad matched EL34, matched 12AX7, etc?
Matched pairs are OK. I would stick to four tubes that are generally the same construction and from the same manufacturer.
etc wrote:Is it possible to add a volume control to the Eiclones similar to the ST35? Help on the wiring?
Does putting a volume control lower the perfromance of any amps? Would it be better to use a preamp?
I would recommend a preamp with these guys, but using a audio pot on each unit is possible. You could use one of the Xicon/ALPS 100K audio pots, wiring pin 1 to the RCA, pin 2 (wiper) to P1-1, and pin 3 to ground.
Shannon