Help! I want my subs back!
Posted this in my build thread but wanted to post separately since it got no responses -
Signal path is NAD 758v3 single sub out to a minidsp 2x4 HD, which then outputs 3 signals - two to the A and B channels of an inuke6kdsp, and one to a crown xls 1502 in bridge mode (I checked my wiring and all looks fine). All Dsp is done in the minidsp and everything in the inuke and crown is set to default/off. I don’t think there’s an issue with the signal voltages between each piece of equipment as far as I know. Edit: these subs were hitting 100db with no sweat/maybe the first light blinking or steady when I was taking initial pre-calibration measurements or playing bass I love you before trying to integrate the subs together. That’s why it feels like it’s not a gain structure issue unless I am missing something?
So I Finished measuring, integrating, eq-ing, etc my subs yesterday and ran Dirac Live. Measurements look nice and smooth (not flat, I had Dirac apply a Harman curve, see below), but for whatever reason, the slam of the bass is gone from what I was feeling/seeing before I even integrated any of the subs or ran Dirac Live.
I mean I hear it and it’s clear, but I feel like something is missing post-calibration. Let’s say with 3 18’s I would expect the opening scenes of edge of tomorrow to rock my room more than the subs did when I was doing basic measurements below 100db. I can crank the master volume up on my AVR but seems I can’t even get the first light to blink on either the Inuke or the crown in a movie scene with heavy bass, even when I crank it to uncomfortable listening levels in the mains (something like -15 on the AVR, I ran Dirac with the main set at -25, which should have corresponded to 75db).
Input attenuation knobs on both the Inuke and crown are maxed out but the digital gain on each minidsp output as well as the overall Input signal were reduced digitally in my miniDSP a bit when i level matched and calibrated to 75db. Dirac set the sub trim almost smack in the middle of its +/-12db trim range at +2db. There’s a nasty suck out in the left most and right most seats around 70hz but even sitting center sofa in prime spot that doesn’t suffer from that, I don’t feel much like I did pre-calibration and integration.
What am I missing? Do I just need to boost the bass more/cut the digital reductions to gain? Is my curve not steep enough going into the low frequencies (see below graph)?
Note: the below is unsmoothed other than center seat so the ‘higher’ frequency response is more choppy than you might normally see in graphs here.