Roscoe Primrose wrote:
Just bite the bullet and build a new box...
Roscoe
Hey Sashi,
Don't build a whole new cabinet!
If you can get the baffle off and gain access to the inside of your cabinet, you could add a skeleton like this:
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Then put some stuffing in there.
The stuffing effect on the driver that the engineers are talking about will more than counteract the loss in volume from the skeleton.
Depending on your listening sensitivity, and the characteristics of the sidewalls on the existing cabinet, it might not be magic, but it will pretty dramatically change the behavior of your cabinet.
Just remember this also: The quality of the bass, and the number of the frequency you might think you want to achieve are two very very very different things. Getting 30 cycles, or 20 cycles, is no holy grail, especially if you don't get the quality right! If you have ever been in a boom car, you might realize that with the cabin gain, a couple big woofers, and a monster amplifier, it's pretty easy to get to 20 cycles. That's not music though! The engineers might disagree, but even with engineering, a real musical speaker needs to be artistically crafted. With the artistic analogy, the engineering basically gives you the size, shape, and consistency of the blank stone. The engineering also can give you a theoretical image you want to overlay onto the stone, but as the speakerbuilder, like the sculptor, you need to bring the stone into form!
When you get the quality right, just getting to 60-50 cycles is more than adequate for a really good sounding speaker.
This is just my method, but how I achieve this is by experimenting with the cabinet material, the thickness of the cabinet walls, the density or mass of the cabinet walls, the size of the actual panels, and the size of the radiating portions of the panels after the actual panels are broken into smaller theoretical panels by an internal bracing system.
The reason I'm telling you this is because a lot of this can be achieved with modifications to an existing cabinet.
You can still fool around with the response of the driver, but I'm convinced that the musical component is found in the construction of the cabinet.