Room acoustics how ? My image is not centered

I assume that you have done all the measurements perfectly. One method is Jim Smith with Get Better Sound. It is not mathmatical but is acoustical. Money well spent. Once perfectly positioned then room treatments will help balance the frequencies. I have a problem with channel tracking at very low volumes with my preamp which will favor the left at very low settings. I am getting new matched tubes. Just a thought. Good luck.

My experience with VAC is a very vivid and transparent sound, but Vac can sound glassy in some systems. It is not my choice in electronics.

It is difficult to give a recommendation about your room without more information.

You don't need to scientifically measure your room, use your ears. Your ears told you something is wrong and your ears will tell you when it's right.

Using things you have around the house to experiment with is a good idea.

Another vote for "Get Better Sound" by Jim Smith. Easily found here and on the web, well worth the money.

Might want to cover the brick wall with a comforter or something...same with the glass.

Bring your speakers a few feet of the back wall as well. Make sure your listening spot is equidistant from both speakers. Might want to try a bit of toe in or out on the speakers as well.

Most of your gains, though, will be from taming the acoustics of the room. That's where Get Better Sound comes in.

Look into to "Master Set Speaker Placement". Worth a try.

I presume you've done this, but if you haven't, measure to make sure the speakers are both the exact same distance from the center of the sweet spot.

If both side walls are quite reflective, then symmetry becomes more important. A strong early sidewall reflection can pull the image over to that side, so you want the early sidewall reflections to be either symmetrical or minimized.

Something that has not been studied much is the effect of a diffracting feature, like the vertical edge of a bookcase. A feature like that can mimic a secondary source, and pull the image over to that side.

Sometimes a "hole" (like a hallway) on one side of the room can pull the image towards that side. I do not know what mechanism is responsible for this, but I suspect the ear/brain system senses where the room boundaries are and might, under some circumstances, "mold" the perceived location of sound images accordingly.

Increased toe-in might be useful. The Merlins may not be the ideal candidates for this sort of setup, but (since it doesn't cost anything) you might try toeing them in severely, such that the axes criss-cross in front of the listening area. This will minimize early sidewall interaction.

Finally, if all else fails, try pulling the right speaker forward an inch or two. The slighlty earlier arrival time may offset whatever else is going on in your room.

Duke
dealer/manufacturer