A:Answer7.5" X 7.5" : got four little cut out for each corner for stability. My JBLs don't move and some times I like to do concert level, they're great.
A:AnswerGood Day,
Our speaker stands are meant to hold most speakers within the weight limit. Please give us a ring @ 800-359-5520 and our awesome Customer Care team can specify if they are actually compatible.
Thanks!
Jake @ SANUS