Griots makes great products. I like the speed shine as well.
You want to be careful not to get any chemicals on the drivers of your speaker.
Im the type that will pull all my drivers out to protect them while I wax the cabinets and then punch a hole through one of the drivers with the screwdriver while reinstalling them, all for the quest of perfection, lol. My Mom said I used to open up and break all my toys before we even got home too.