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You need this:
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Whatever I did last night did the trick! Everything sounds ideal tonight!
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Guess last night was fix your stereo night. I put the connections on the ground lugs and both subs work. Guess RTFM should have been done first. More tuning to do still. First sweep looked ok, but giant suck out at 45Hz.
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Good luck. Iâm glad I just use my ears for measurements. Much less frustration and less critical.
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I doubt I can fix 100%. move it this way and the dip just moves. But I will get the best I can and run room correction. That method has worked wonders.
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More subs thatâs the solution. Lol
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only 4 more and I can do the Trinnov Waveforming.
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Brian, I suspect you already know this, but if you move them symmetrically, all youâll do is move the location of that dip. In cases like this asymmetrical placement of the two subs usually results in better (if not perfect) smoothing for this kind of problem.
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Tony thanks for the tip. I need to make long power leads and some scrap long speaker cable and find the best spot. or just do the Sub crawl and get it over with. Find the two best spots on each side of the room.
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Put them both on furniture gliders. Makes it a lot easier! 
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I reported last weekend that my recent Puritan power conditioner was a complete success. Today, day 12, is the first time where that hasnât proven to be completely correct. Last night it was phenomenal. Today, while still good, the sound is not quite there. If yesterday was a 10 today is probably a 7 where it probably would be a 2 before. I wouldnât consider that a âbadâ day but stillâ. So, I would say the Puritan isnât necessarily a 100% fix every day but it does raise your floor when the power company seems to be working against you.
PS. Itâs been about 90 minutes since I last listened and itâs back to phenomenal again! So there you go.
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Voltage drop? You need a P20. lolâŠ
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Great. Nothing more annoying than a transformer hum. I know you use CAD for signal grounds. Do you have the Apex chassis grounded to the PZ?
Couldnât hurt.
BTW, can you attribute the quiet to anything specific you did? Several mentioned changing cable placement to cancel interaction. That has helped me a couple times over the years.
Vmax would have slapped a sheet of RF suppressing material over your trannie. Lots of possible solutions.
I had hoped the Schnerzinger GP could address this issue, but eradication of DC on the line (if that is the culprit) seems to require specific measures and devices, or luck.
Isnât this audio stuff simple? 
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I connected my MU2 to my older CJ power amp today (ok, with the Infinity box in between, but no other preamp). Crap!! Female vocals seemed really nice today on the FR20âs.
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In the not so distant pastâŠwhen I first heard my Diablo 300 give notice of a slight transformer humâŠI was not to happy with the anomaly that creeped into my audio world⊠I could not understand it,until I noticed that when the amp hummedâŠit was only when my wife was using her hand held blow dryer to dry her hair in the upstairs bathroom. Iâm glad I figured it out without to much pain involved! 
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@aangen You can and should connect the black to a chassis screw on your amp (and not, as youâve found to the negative terminal). In my setup, I just connect the black to the outer barrel of the unused RCA input on my balanced AGD ampsâŠ
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@scotte1 I have two SnubWays and two Main Streams. In my experience, they are effectiveâŠ
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Have not played with it enough to be sure, but darned if I said I didnât think I heard a bit more âquietnessâ on the few tracks I listened to late yesterday after installing it on the duplex outlet in my P10 Regenerator that my PSA DS Sr. DAC is plugged into.
Will give it some time and then try it in the P10 duplex outlet serving my Pre/ProâŠ
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How have you elected to âdeployâ them.
TIA.