@gavin1977 I owned Thunder, Tornado and Hurricane.
Here’s my free advice…take it for what it’s worth…
Start closest to the speakers and work your way up the audio chain. Going from the source down will be less effective. So…speaker cables, power cord on the amp, interconnects feeding the amp…those are the most critical cables and will make the most difference in your case…with emphasis on “your case”.
Brightest interconnect should be (if you have to have it) from source to preamp tamed by the equivalent quality copper from pre to amp - this always worked best in my system.
Placing the Hurricane on the amp will also help with your problem