It's great you can borrow equipment from your local dealer. It would be a good way to find out if your system would be more coherent with all tubes and if it is meaningful to you.
I was runnig the Dunlavy SC IV speakers with Audio Research tube electronics. Dunlavy never believed in bi-wiring, but the dealers and reviewers pressured him until he started offering binding posts for bi-wiring or bi-amping. I tried the speakers both ways and I preferred the sound with single wire because the speakers were much more coherent.
I will be interested to know if you try another pair of tube amplifiers on the bottom and the results. Please keep me posted.
I was runnig the Dunlavy SC IV speakers with Audio Research tube electronics. Dunlavy never believed in bi-wiring, but the dealers and reviewers pressured him until he started offering binding posts for bi-wiring or bi-amping. I tried the speakers both ways and I preferred the sound with single wire because the speakers were much more coherent.
I will be interested to know if you try another pair of tube amplifiers on the bottom and the results. Please keep me posted.