A hned na 5.odkaze google mas ze jak sa to rozobera
http://rennieash.wordpress.com/2013/03/16/whats-in side-the-logitech-x-140-speakers/

The grills can be taken off by using a flat screwdriver, inserting it between the grill and plastic, and twisting the screwdriver carefully to lever the grill out. It is best to start at the sides near the bottom. You may want to wrap the tip of the screwdriver in tape to reduce the chance of damage to the speaker. Getting the top part out is tricky, you have to try and lever it out from one of the sides without just bending it up from the bottom – use your hands only here. They are glued on with a sticky “contact” type of glue, so you can warm the grills with a heater beforehand to make things easier. Be careful not to overheat the speaker drivers.