Another idea that works well for high current amps, use a PASSIVE not active line conditioner. Richard Gray equipment is excellent. Audio Research Corp uses these conditioners exclusively,because they don't limit the power that high current amps need. Most active conditioners like ps1200's still cannot handle the bigger amps. The fact that you have sound degradation is based on two likely limitations of the device you are using, lack of adequate capacity to handle your amp's power needs, and it's circuitry is adding color to your signal line. Look at the Power Substation that Richard Gray makes,20amp as well as it can come in 240 volt option that you run a dedicated 240 volt line, which completely isolates your system. From a protection standpoint it can take a direct hit and will be able to protect your amps. Best of luck.
Olenorge
Olenorge