Zero hiss. Klipsch 3 way Jubilee clones with QSC RMX 5050a amp.
Though it took me trying out over thirty amps and switching to balanced connections before I got to this point of absolute quiet even with no audio playback.
I wonder if you can use a pair of big amps with the Heritage Jubilee? I was thinking 350 W per channel for the HF/MF and 500 watts per channel for the low end.