This achievement sounds harder than it actually is. The trick is timing and knowing your combos. However, preparation is key.
First of all, you need two focus bars to pull this off, and at least 2 X-cooldowns and 2 Y-Links. This way you can create the Y-X-Y-X-Y combo, with the X's being the cooldown Pressens and the Y's filling out the link spots. This will give you a cooldown effect of 85 seconds, which will drastically cut the time needed for the logic bomb to be recharged.
Secondly, load up the sixth chapter until you come across the Elite Enforcer with his two Leapers. Let the leapers hit you and use a weak X-X-X combo to build up your Focus. Once you've gained three blocks of Focus, defeat the Leapers and their handler.
Once you've defeated this group of enemies, five Leapers will appear, use your first logic bomb as soon as possible, then move to the back of the area immediately. Here, another Elite Enforcer will drop down to fight you. It's here where you'll need to perfectly pull off your Y-X-Y-X-Y combo until your Logic Bomb is available for use again. Use it, and enjoy both the sound of a bomb going off and the achievement unlocker.
Finally: I did this once I had completed the game, as you'll be required to have unlocked a lot of Pressen-moves and need at least two blocks of Focus.