C4s were the go to speakers for years when system was set up in living room but when grandkids starting jumping off amps had to seek refuge in abandoned bedroom where the large Dyns were too constrained.
Since the weather has been pretty hot lately have been listening thru the Dynaudio Heritage Specials with Zanden tube pre and Reimyo KAP 777 a SS class AB design that gives off no heat.
When things cool down will go back to connecting ATCs to FMA pre / Accuphase class A monos.
In bedroom have an integrated Parallel SET EL34 hooked up to Proac 1S or 1 SC that are also standing by because of the hot weather.