Yes mayroon silang effect at di lang display. They tend to change your soundstage width and depth depending on their position on top of your speakers. Pleace them at the back and your soundstage will move backwards. Move them wider apart and your soundstsge width will also improve. Too much though on my set-up and could affect my center imaging.
Totem speakers are selling them named as Totem Beaks. They are not cheap so for me, i use the cheaper alternative which is the Plumb Bobs.
Totem Beakk
Plumb Bobs
Sir Deo, sorry din sa O.T. ha, sir edwin, will this work with other speakers? Yung Focal electra, may glass sa ibabaw eh, and when you said that the soundstage will move backwards, does this mean na parang umatras yung speaker position or lumayo sa listener without really moving the speakers?