Spenceroo, the outriggers mounted into the same holes that the spikes go into. They look great !.
My floor (cement) was uneven and all speakers would rock where I placed them. With these outriggers the babies are level and solid. Great product.
I have 302 hours on the speakers. Low volumes they sound great.
I cant wait until I can start turning down the rear speakers, I think with my room, full on is too much.