IB Subwoofer w/ Linkwitz Transform Circuit *PIC*

[mike1234]

Provided Link: Linkwitz Transform Circuit


Here's another IB sub idea...

What about using a subwoofer with a mid Qts (.5-.7) with high Fs (70-80Hz) with a high quality motor crossed over below resonance (lower than 50Hz) and supplemented with a Linkwitz Transorm Circuit (lnk). This combines the benefits of IB and the Bag-End-type design.

[mike1234]

Provided Link: Linkwitz Transform Circuit


...the Elliott Sound Products website. (link)

> Here's another IB sub idea...

> What about using a subwoofer with a mid Qts
> (.5-.7) with high Fs (70-80Hz) with a high
> quality motor crossed over below resonance
> (lower than 50Hz) and supplemented with a
> Linkwitz Transorm Circuit (lnk). This
> combines the benefits of IB and the
> Bag-End-type design.

[Deward Hastings]

LTs work great for tuning LF response with already suitable drivers. They greatly facilitate crossover design. There are pitfalls, however, in the application you propose . . . most notably that your sub will likely become excursion limited rather than power limited. And that's an almost certain way to bust the driver. You must adjust LF response respecting both driver excursion and available power . . . every bit of LF extension you get with a LT means *less* output higher up . . . not because the driver/amp combo can't do it, but because it's not safe if a LF signal comes along at that level. That's why some pro installations use frequency dependent active limiters.

And, of course, subwoofers are critically room dependent. You should look at them as part of a system . . . the LT is one possible component, which may or may not nelp, or be needed. Far better to start with the right driver and make it a bit better than to try to make something work that doesn't, by itself.

TANSTAAFL