Bass is not enough !!! Speaker problem? Speaker cable? Power Amp? PC of Power Amp?

Well, your room is certainly big enough. Do you have acoustic treatment in the corners (bass traps)? And at the first and second reflection points?
Also, you do need to pull the speakers out in the room and away from the side walls if you have not (1/2 meter is not at all ideal), and be sure you have something breaking up the waves at first and second reflection points. If acoustic damping is not possible right now (because it looks bad), a tall plant (ficus tree, palm plant, or something with leaves that break up the reflections) will work well.
Room is EVERYTHING, something people forget. I have heard the same system in 3 rooms and in one room, it was....decent. Second room, good; third room was great. Exact same equipment ( know because I had owned it before I gave it to two friends). It was the room and how the equipment was set up. And acoustic treatment is important: Soft rugs or fabric woven art are great near the speakers. Or heavy cotton curtains (HP had one wall down the length of his listening room covered with a curtain on a rod. The curtain was thick and had folds in it). Other than that, he just had  a piece of Sonex at the first reflection point near one speaker. 
The room comes first.

Let's not exaggerate - room is not everything, as important as it is.

You are correct - to a point, so let me amend that, then.

Room INFLUENCES EVERYTHING.

 Even HP, if you read his TAS review of the WATT/Puppies in issue 65, seems not to have gotten the best out of the WATTS, as contradicted by Dave Wilson's comment provides (I had WATT/Puppies since 1987, and owned 4 generations of them. My room in California was 10x13x27. Dave's room for the WATTS was…well, huge, since he had them in his warehouse. With MY Goldmund Studio (which Dave had set up) on the WATTS, the sound was vastly more open in his warehouse. This was back in 1988, when he was still in Novato, California. 

Now, you're free to disagree,  but I have found, in my Connecticut home, in my two ASC- Wall Damp treated  listening rooms, the exact same equipment sounds different in the 13x20 room than it sounds in the 23x45 room.
As Anna Russell once said, I'm not making this up, you know.

I use subs that I turn up or down when I feel they need adjustment…and KT150s do kick butt…I've had mine for over a year and love them things. 

Bass is all about moving air, speaker placement and seating position.  If one of those factors are wrong, then bass suffers.  Period.