Originally Posted by Delija
There is no much sense discussing about that without measurements.
There is not much point discussing any
aspect of in-room audio without measurements, I agree. But absent measurements we can speculate and perhaps proceed by trial and error, which is all we can do. Unfortunately not everyone has the capability of measuring their room and/or properly interpreting the results, so what should we do in those cases -just give up?.
However, I am sure that this does not apply to Molon, and once his new unit arrives he will be able to provide us with a full set of REW and Dirac graphs which will, hopefully, explain what is going on. Meanwhile, simply moving the listening position around the room while playing bass-heavy content is a reasonable way to determine if MLP is sitting in a null.
There has to be a reason for his 'thin' bass. I do not believe that Dirac Live is causing it as such, or many others would be reporting similar problems and they are not (certainly not in the 'real' Dirac Live thread which has been running for years). However, something is clearly going on within DL if switching DL off restores the bass. It may be a faulty implementation or user error, or who knows what, but fundamentally it cannot be an issue with DL as such. Given that the 758v3 has not exactly been a standard-bearer for Quality Control, it is even possible that the unit itself had a fault. In that case, the issue will just disappear when he installs his new unit.
There must be an explanation and measurements will certainly throw some light on it (assuming they are performed properly of course). It is an interesting problem and one which, I am sure, we will collectively be able to help resolve.