This is what you can expect from various alignments of the Omega 15:

Cabinet size Box tuning -3dB -10dB
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2.0ft3 40Hz 65Hz 43Hz
3.0ft3 40Hz 50Hz 37Hz
4.0ft3 40Hz 45Hz 35Hz
5.0ft3 40Hz 43Hz 33Hz
6.0ft3 40Hz 40Hz 31Hz
7.0ft3 38Hz 38Hz 30Hz
8.0ft3 38Hz 38Hz 30Hz
9.0ft3 35Hz 35Hz 28Hz
10.0ft3 32Hz 32Hz 25Hz
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As bandwidth goes up, intermodulation does too, so the lower you push the midwoofer in a two-way speaker, the more midrange will suffer. The Stage four π loudspeaker gives nice flat response and is a good compromise between bass extension and midrange clarity. It is a good all-around speaker that sounds good in large areas with limited boundary reinforcement. It sounds balanced in half-space and quarter-space is good but eighth-space is usually a bit too much. The Stage four π sounds natural and full without a sub, but can certainly be augmented with one.

The Theater four π has a little bit different characteristics. It has rising response, and really benefits from boundary reinforcement. It is also good for use in situations where extra midrange presence is required. Having a larger box provides deeper useable response, but at a reduced level. So the Stage four actually sounds like it has more bass, if both are compared in a large room. If placed in corners or floorstanding against the wall in a small or medium sized room, the Stage four may even sound bass-heavy where the Theater four sounds just right.

It's been a while.

I've seen people on various forums wondering why the moderator "does it". Buy what you want, write it off.... Not a bad deal. Known as "supporting the habit".

I hope the summer's going well, the families good, the wheels are fun, and the beer is cold.

Take it easy.

Grant.

Weather here is similar to what you have. Humidity is 60-80 % often too and the resulting smog is just nasty.

Nice lead in to the cooling system BTW...

It looks engineered to work (I can't think of a nicer thing to say knowing you). No plug of air moving back and forth. That should really make a difference to those that need...

Enjoy your summer.

Grant.

Increased voice coil temperature changes electro-mechanical specs and alters cabinet tuning. It also is the cause of compression and power limits, not to mention thermal failure. By reducing temperature, we improve the speaker in all of these areas. I'm very excited by this.

You didn't mention any downsides yet other than the obvious cost and work involved. Cost should be easily taken care of when compared to cost of thermal failure.

Now that you've got the intercooler in there you'll have to work on a turbocharger next.

Have fun Wayne.

Grant.