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ProggRob, I started a new thread as not to Hijack the other. I've run my twin Mid Bass Modules (12" downfiring drivers in each) with my Klipsch RF-7 mains (two 10" drivers in each) for a total of 6 drivers and they integrate seamlessly.

You used the term Muddlied Bass when setting the crossover between 80 to 120hz. Would this be the same as what I refer to as Boomy? Boomy to me is generally caused by sub hum or unwanted room interactions that cause a narrow frequency range to be reinforced above the rest of the range.

Initialy I had a hum in my Mid Bass Modules that I finally tracked down to a ground loop and resolved. Then I realized as I increased the Mid Bass Volume my floors & walls began to vibrate causing unwanted Bass reinforcement by the room (Boomy). I placed my down-firing Mid Bass Modules on Subwoofer Isolation Platforms and resolved the unwanted floor & wall vibrations. I also found that speaker level connections to my Mid Bass Modules created a much more seamless integration between Mains and Mid Bass Modules.

Now if I turn the Volume up to high it simply sounds like too much Bass. It's still smooth just too much low end for the music being played. It does not get Boomy since resolving the issues noted above.

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ProggRob,

I don't have personal experience with the Augie's. My Mid Bass Modules and the Omega DeepOmega Sub have very light 12" driver cones for speed at the higher frequencies. Not sure if the 15" Augie's are light enough (fast enough) and that may be the reason for the Muddled Bass at higher crossover frequencies.

I have a pair of HSU ULS-15 Subs (15" drivers). These are great Subs at a crossover of 60hz & below. As you describe, they get what I call Flabby around 80hz & above.

So I'm not sure why you are not able to achieve the same performance as quoted by the reviewer comments below?

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This Comment:

"It seems to me that many listeners confuse bass weight with bass extension and opt for a subwoofer when bass weight is lacking. The problem typically lies in the upper bass, the octave from 120Hz to 240Hz where much of an orchestra's foundation and acoustic power resides."

This is perhaps the best description of what the Mid Bass Module does. I've always said I would choose the Mid Bass Module over a Sub any day of the week because the reinforcement up into the 150hz range is where the Weight is.

Update after an evening and morning of crossover experimentation: in my system, the Augies need to get the hell out of the way of the mains and provide support in the sub-bass range.  I'm relieved that my previous experiments did not err; I'm in the right place.

On some tracks, the additional frequencies 75-120hz were really cool, but on others it is a nuisance.  If I'm to pick a setting that works for all music, Augies are relegated to sub-bass duties.

Rob