At heart really simple valves and horns, directly driven by the DAC. lots of tweaking, though with particular attention to power supply and RMI/EFi as well as ground level elimination
Wow. That is quite a list. I found your speakers. It would be really great to see some photos. This would be helpful to identify major components and really get a feel for the system. You have clearly put a lot of effort into your system. Congraduations.
