Is Spiking Necesarry?

Mr. Clone OP, to circumvent the whole problem of continually moving the speakers around to try and get the best sound why not just cut to the chase? Use the speaker set-up track on the XLO Test CD to find the absolute best locations for both speakers. You’ll never have to move them again. Using this method on the XLO CD is much, much better than trial and error, which is really like trying to solve 4 simultaneous equations in 5 unknowns.

goeffkait,

I've never used that CD.  Can you explain what type of tracks it has specifically to help locate the speakers properly?

It’s the Out of Phase track. Move the speakers a little at a time. Start with speakers about 4 feet apart and slowly move them apart. Would you believe most speakers are set too far apart? I suppose we must think soundstage will be improved by moving them farther apart. "When it sounds like my voice is coming at you from all around the room" (when the sound is most diffuse) ...the speakers will be in the absolute best locations for when the system is in phase. It probably goes without saying that room anomalies should have been dealt with prior to using the speaker set up track, in order to be able to get the Full Effect of the voice coming at you from all around the room with no specific directionality. As the room acoustics improves so will the clarity and drama of that track.

I have lowther fideleo speakers on a slate floor & have found that spikes on top of ball bearing footers work well. I don't move them once in the sweet spot though. That would truly be a pita. The combination creates a nice soundstage.