schlager

StabMe, a very impressive project you have going on. MEH CAD generated STEP files for CNC, that is beautiful👍 I made my Synergy horns the old "analog" way, it was fun, but time consuming, not doing that again. After seeing some measurements and pictures of your listening room, I do feel I have some valid suggestions, take it for what it's worth🙂. You have a very nice and big listening room, but as you know, it can be a double edge sword. With a lot of hard surfaces and relatively long distance between them, suppressing echo and flutter can be hard. With the things you have already done, you have substantial improvement over the untreated room. One very easy thing to try, is to move your listening position closer to the speakers. 3 to 4 meters from the speakers will give a much higher ratio of direct vs reflected sound at LP. By the same token, the direct sound will increase in SPL and the decay of late reflected sound will be lower in SPL. Also I would replace the diffuser on the ceiling with absorption. In that way all early reflections will be dampened. Behind the LP you could play around with different combinations of absorbers and diffusers. In your large listening room I would look for spikes under the tab Filtered IR in REW, up to 50 ms. I have shown an example below. All the circles in the first plot represent unwanted reflection. Playing around with absorbers, behind LP, you should aim to remove as many spikes you can, see the "after" plot. There is still a reflection right after the initial 1. spike, in the after plot, which is from a small table. Ideally after the 1. IR spike to zero, the energy should drop as low as possible, in the first 10 ms and suppress strong peaks in the first 50 ms. These early reflections are largely responsible for messing with the stereo image and timbre of what we are hearing. Suppressing them hugely improves the clarity and detail of the stereo sound stage and the body of the instruments. For a more even bass response you could try to implement 1 or 2 subwoofers to smooth out the response. The key word for a tuneful even bass response is correct implementation, which there are different methods for. REW will be useful for that. Hope it helps. Best Sebastian

Did this thread come to a grinding halt? And was there ever a tutorial released about the topic at hand?