I've had good luck with Giant Herbies Sliders. They allow me to easily move my floor standers out from the wall for serious listening. My speakers only weigh 60# ( half of yours) and my carpet is low, so your experience might differ. But it might be worth trying.
Heavy difficult to move speakers- how do you deal?
I have a tough decision. I have speakers with built-in casters and move around quite easily. But I’m thinking about buying new speakers that have spikes and discs and weigh 120 pounds each.
Has anybody figured out a way to make life easier should you want to move a speaker around your home or even a couple feet from where they currently are?