Resonance control devices

Many different tweaks of this nature have been available through the years, from Tiptoes (which I love, primarily because of the way they look under components) to Magic dots, VPI bricks, Sorbothane this or that, isolation platforms, whatever. More on this later.

I have found that if I train my cat Pogo (who actually is an audiophile) to sit in a strategic place on the subwoofer it lowers the resonant frequency by 8hz.

 Problem is, he wants to switch places halfway through the record. Told him, "Only if he buys his own cat food".