Tornado and Thunder Power Cables

To a Nordost Blue Heaven. The amps I would go to a cheap 12 gage power cable. Also, If this is for two channel in any way I would check out the Emotiva XSP 2 channel preamp. It has home theater bypass. You can use your 2 channel Rotel amp with it. 

if you are keeping your existing gear: Thunder on both amps & Blizzard on the preamp: If you are upgrading in future, then you might look at the Tornados or Hurricanes: I use a mixture of Hurricane, Thunder, Blizzard. I never tried the Tornado: Putting Tornados on Rotel amps, while good amps, seems your money would be better served buying better amps first."

Dynamic Design Lotus AE15 - same ballpark, or less, used. https://www.usaudiomart.com/details/649750561-dynamic-design-lotus-ae15-15-meter-power-cord-mint-con...

Hey OP, another typical cable thread. My advice is to ignore most replies and try some different cables at various price points and hear for yourself, in your system. The cables do make a difference and should be considered along with other tweaks to enhance the performance.

It is also to be noted that members who proclaim in their first sentence " I am an electrical engineer" and go on to deny, probably without ever trying some cables, that there can possibly be any difference, are to be regarded as inexperienced in matters audio.

I see the EE above suggesting room acoustics and correction software.

This I totally agree with and encourage. A properly treated room will do more than any tweak or component swap, however room correction to me is a band-aid.

This band-aid is of limited value if any. Sure it can radically alter the sound but is it better? The reason for room treatment is all about reducing overly long decay to a certain level within a certain time frame which is dictated by the volume of the room. For that absorption is needed. Room correction software can not anticipate and reduce the decay and fill in the nulls resulting from cancellation. Consider that if you drive more power into a null it will just cancel with the same power.

Last bit of advice, promise 😁   Any room  treatment you consider adding and which I thoroughly recommend should prefereably be done first as you may be for example trying to tame a bright sytem by using 'warmer' cables etc. which will take you in the wrong direction. Room first will also allow you to better hear and choose the best for the job.