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In Reply to: RE: Anyone tried this baffle design? posted by Bill Fitzmaurice on June 20, 2014 at 12:21:03
Are ok maybe isolating the driver on the small baffle might help too. Very strange .. At first glance it looks like something that just wouldn't work!
I have some boxes the right size that I can easily bolt a small baffle too. They say in the description that very low bass can be had from very small box sizes. But reflex is to inaccurate in the bass. Will this be any different?
Follow Ups:
This design pre-dates the use of T/S specs and modern ducted port formulas, and as I said its main advantage was the ease of seat of the pants tuning on the fly. Otherwise it works like any vented box, and it can be software modeled. But modeling gets very complicated if the baffle is square, while it's very easy if it's made round. It won't go any lower than any other vented box, because that's what it is.
As to "reflex is to inaccurate in the bass", that's simply not true. If it was so then bass reflex would not be the most commonly used alignment.
Ok I think I get it. Even though the front baffle is like a tiny open baffle. Bass wont cancel because the air is under pressure.
Thanks again. Making the dowel adjustable might make it a very tuneable box.
Unbelievably I might just actually do a pair of these.
A little differently. I will put my spin on it.
If you ignore the fact that the driver is mounted in the baffle it's easier to visualize how it works as a ducted port. A variation is this configuration, which places the baffle behind the cabinet front rather than in front of it. The two function identically.
that's looks close to a Jensen if you just turns the ports around and put them all the way along the sides. And like the Jensen I like that because the front baffle external resonances(honks) are shielded by the front panel and on the Jensen the inner side walls honks are masked up by the outer cabinet walls. Like carpet for pa horns.
I am surprised this design is not used more. I love the way the vent flows out around the driver. And the way the front baffle masked resonances as mentioned above.
And if it WEREN'T so, there wouldn't be a need for any other 'alignment'.
;-)
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