The graph above is taken at the listening spot after a measurement session aligning the subwoofers with the line arrays. It shows the distortion of both channels, playing both the arrays plus subwoofers. In time I will revisit the subwoofer DSP, but for now this first integration is working real well. The plan is to revisit this transition later on. I still need to make a proper template for Subwoofers to be able to use DRC-FIR.
See the timing graph that belongs to the above plot:
Not bad at all for an afternoon’s work I’d say. I’ll try and clean up the 55-200 Hz area in my next attempt. Not that it’s bad right now, I’m just curious enough to see what can be improved.
One target for this subwoofer experiment was to clean up the frequency/time per channel, the Stereo separation between left and right channels has been improved quite a bit. My own set of DSP tools was used to get these results at the listening spot. Don’t expect this kind of behaviour right out of the box. EQ + phase manipulation as well as time alignment was used. Read a bit more about it here.
These first results were done in one afternoon. I really should take more time to do it even better. However the sound is great, these settings were copied over to my Home Theatre section and thoroughly tested with many movies ever since.