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In Reply to: RE: Subs are sub optimal with magenpans! posted by Satie on February 23, 2017 at 07:50:14
That all makes sense, but what I can't understand is why the mains are being overdriven at low frequencies when the P5 bass mgmt is supposedly cutting off the frequency at whatever I set it to (currently 50hz, but I tried as high as 80hz with the same results). Very strange...
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My best guess is that the subwoofer level you prefer gives you a higher relative output vs. the mains rather than just extending the bass an octave or two, so that when you calibrate and run Dirac it tries to undo the relative output mismatch by raising the relative output from the mains. There is also the possibility that the bass phase/location (i.e. delay) is not matching well with the mains so is producing comb filtering which requires allot of correction.
That is why I suggested measuring the results with the sub and bass management with the P5 and optimizing FR with XO, level and placement before applying Dirac.
Hmmm. Now I think you're onto something. I'll bet it's the phase, as you mentioned. The Rel can output at 180degrees of phase. It would be great if it could change to any of the the 360degrees, so I could dial it in exactly. I'll experiment with this. Thank you!
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