Uses the W3-1876S 3" TB sub, and it does seem to do the job.
Uses 2 of these:
...and one of these:
...in 2.5 ltrs, bass to 40 Hz.
I call it the Microdot because it can produce a lot of info from a small space.
Later,
Wolf
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Smallest 40Hz sub I've simulated... 'Microdot'
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Greetz
Here's a list to understand why it might not work, and what I like about the Microdot:
- Microdots are smaller than the 2053 design would be. That was a design goal. 'Better' is not always a performance goal. Sometimes aesthetics trump performance, so I strive to minimize the performance loss.
- The 2053 is a lot larger in frame, and finding PRs to fit the design in the small volume requirement is going to be difficult, while getting the tuning low enough.
- There is another issue with regard to PR integrity. Not very many small PRs exist, and no small PR will keep it's composure with the 2053 behind it, and the mass required. This more or less means that a 6.5" minimum PR is required (possibly a pair), and actually likely an 8" PR for best results. I've modeled enough of the TB subs to know that that volume/mass/Sd requirements are a very delicate juggling act. With all of this in mind- it will not be in as small of a package as the Microdot.
- TB has actually made special PRs for this purpose of use with the 2053, and they are not DIY accessible without buying the combo of drivers or kit, and are not sold stateside. The design basically already exists.
I think you need to understand more about designing speakers before questioning why someone made a design choice. You also need to understand that it is their choice, and you and they are both free to design as you or they please. What weighs heavier for you will guide you in your design quests, and mine will guide me.