Horning Eufrodites - help needed with boomy bass

I think Duke's idea is a very good one and easy to undue if you don't like the results. The following is also easy to try. The replacement or reduction of 90 degree angles that I mentioned earlier there is one major angle you can try replacing. The niche or nook, that angle can be changed in a fairly easy experiment. If you had a solid wood panel like a door or you could take a door off its hinges temporarily you could place that barrier at the niche. The barrier wall of the niche is at a 90 degree and if you experiment by placing that panel at a 35 to 58 degree angle so it intersects the front edge and the side wall I think you will hear a big improvement. You can use this panel to steer the bass and listen for a change in angle and a change in how the room loads the bass. You have to use a solid not a rug or other porous material. If this idea works well you and the family need to decide what looks good and sounds good. I have performed these experiments before and have made permanent changes as a result. Tom

Amuseb, have you had the problem from day one? Lots of interesting suggestions, but maybe this isn't the spkr for your room, period?
I used to run Zu Definitions Mk2s, with xoverless full range drivers and 4 x 10" bass drivers out the rear, so some major similarities with your Hornings. Bass integration was a major issue, and I mostly solved it using the Spatial Computer Black Hole anti-bass wave generator, which sitting behind the listener, uses a mic and dsp to sample the bass from the main spkrs, and pumps bass into the room to eliminate phase issues, standing waves and bass nodes. The problem wasn't totally solved, but improved a good 60-70%.
I've upgraded to the Zu Definitions 4s which dispense with rear firing woofers for a single floor firing one. Bass better than ever, but still helped by the Black Hole.
For $1250, full money back guarantee, it's worth a try.

I've been trying some of the suggestions you guys have gathered for me, the stacked wood, some polyester stuffed, some more positioning, a large painting on the corner created by the little wall on the left to break the 90 degrees, etc.
so far, nada.
the boominess is there at all cases, sometimes it's even worse, except for those two pillows that were very strongly pushed into the ports but that have also significantly reduced the dynamics and extensions on both ends of the music.
tonight I have here a Karan KAI180MKII integrated at home to listen to a little but even though I can tell there's more control in the bass department, it's still boomy, and still the left side is the more boomy part of the room.

the best "proof" of the bomminess is my 6 years old daughter who walks in front of the speakers, while playing softly, and says "it breaks my ears".

bottom line, frustrating.

spiritofmusic, yes, this thought has crossed my mind but a) I think these speakers setup right really play lovely music. b) the last thing I feel like doing now is selling/buying etc namely in the current economic mood here in Europe.
so I'd rather try anything possible before giving up on these.

what's next?

thanks again for the help from you all.

Time to give bass traps a try, you have nothing to lose.

Have you swapped speaker position left to right? The angle thing..needs to be larger and denser than the painting. Tom