Removing spikes... Now my speakers sing

I think you just answered your own question. 

I’ll give GK the benefit of the doubt and assume he is just naturally high on himself and there is no escape.

Anybody try the SVS Soundpath feet under their floorstanders?
https://www.amazon.com/SVS-SoundPath-Subwoofer-Isolation-System/dp/B00NCSQ5GK/ref=cm_cr_arp_d_produc...

I have them under my HSU sub and definitely noticed an improvement.

Mapman, you probably know this already.

Amish directions in the event you encounter an alien in an aircraft, although I’ve been under the assumption Amish folk are known to have an inborn fear of flying and deep mistrust of technology generally and aviation specifically. But I digress. In case of an alien encounter while in an aircraft,

1) Crawl under your seat & look away,
2) avoid eye contact, and
3) In the absence of eyes, avoid ALL contact.

Good of luck in your quest for the meaning of gravity and it’s opposite, comedy.

I will pass that on from you next time I talk to an Amish person. I’m sure they will be grateful.