I suggest you consider adding an isolation transformer. If your incoming AC voltage is not stable, add isolation transformer with voltage regulation.
I started with passive power conditioners (Shunyata Hydra Alpha and Furutech e-tp609 x 2) for my main system. Then I have power supply tube failure in my AR Ref 5SE which blew the speakers' mid-bass drivers. It was caused by AC line over voltage (I am in 230V country). I bought Torus AVR30 Wall Mount which does not come with power strips, so I wired the 3 passive power conditioners to AVR30 outputs. Oh man, what a big difference it makes to background noise and resolution. It was a very significant upgrade.
Since then, I added Torus RM (isolation only with built-in power strips) to my other systems without any passive power conditioners.
The comment by almarg about impedance matching is very correct. Initially the output of my AR Ref 5SE goes into Bryston 10B-SUB (10k impedance) which drives MC452 and JL f113 subs. Too low of impedance cause high frequency roll-off. I eventually went to passive route (semi DIY fully balanced silver slagleformers) and sold the Ref 5SE.
I started with passive power conditioners (Shunyata Hydra Alpha and Furutech e-tp609 x 2) for my main system. Then I have power supply tube failure in my AR Ref 5SE which blew the speakers' mid-bass drivers. It was caused by AC line over voltage (I am in 230V country). I bought Torus AVR30 Wall Mount which does not come with power strips, so I wired the 3 passive power conditioners to AVR30 outputs. Oh man, what a big difference it makes to background noise and resolution. It was a very significant upgrade.
Since then, I added Torus RM (isolation only with built-in power strips) to my other systems without any passive power conditioners.
The comment by almarg about impedance matching is very correct. Initially the output of my AR Ref 5SE goes into Bryston 10B-SUB (10k impedance) which drives MC452 and JL f113 subs. Too low of impedance cause high frequency roll-off. I eventually went to passive route (semi DIY fully balanced silver slagleformers) and sold the Ref 5SE.