I think George is suggesting that my complaint about the Luxman (bright sound on female vocals, strings and piano is caused by the Luxman not being able to drive the 2 Ohm load of the SashaSorry, what I means is that the JC1+ can push more current than the Lux and has more Class-A, therefore filling out the lower registers more than the Lux, that's probably why your wife likes it more.
As for getting another Lux and bridging it I said don't, as when you bridge amps the first thing you loose is stability into low impedances (Sasha has 2ohms)!!! So don't bridge is what I say. But vertical bi-amp instead.
https://imgbb.com/M8gRTS3
Cheers George