Add On Subsonic Filter - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 18 Old 09-13-07, 11:53 PM Thread Starter
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Re: Add On Subsonic Filter

True. But I have found that the simulations can give a general idea of what to expect. At least it's a starting point. REW is excellent in showing the difference between simulated and actual response. Too bad there isn't some kind of test to show the difference between simulated and actual cone excursion.



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post #12 of 18 Old 09-14-07, 12:24 PM
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Re: Add On Subsonic Filter

I was also wondering what I should do about this... I think its a very valid question..
I have narrowed my descision to build to 2 - 320 liter boxes with a TC-2K each and looking at powering them with 1800wpc each... How do I protect these drivers from damage with no highpass filter...
What are the other various methods for a highpass filter...?
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post #13 of 18 Old 09-14-07, 01:22 PM
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Re: Add On Subsonic Filter

Quote:
How do I protect these drivers from damage with no highpass filter
That's what we have been discussing. The electronics can protect the drivers if your tune is low. What is your target tune?

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post #14 of 18 Old 09-14-07, 02:01 PM
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Re: Add On Subsonic Filter

oops! I did it again.... I meant 270 liters

My target tune is whatever 15" TC-2K's model out to the best in that (270 liter - 9.5 cu. ft.) box size, 14.5 to 16.5 hz.... I still have to iron out the wrinkles, but thats roughly the size boxes Im looking at... Im not all that great with the WinISD yet... but Im trying...

Will end up being a 6" port, just not sure on the length yet...
Going for a Downfiring enclosure...

Last edited by Warpdrv; 09-14-07 at 03:16 PM.
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post #15 of 18 Old 09-14-07, 08:58 PM
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Re: Add On Subsonic Filter

Nobody who has followed the LLT requirements has bottomed their sub with program material. You should be fine.


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post #16 of 18 Old 09-17-07, 06:30 AM
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Re: Add On Subsonic Filter

Interesting comment by Ilkka on compliance decreasing with excursion.

The rubber band effect!

Which gave me yet another crazy idea for driver protection.

Stretch rubber bands across the face of the cone between the driver fixing screws.

Add a bit of felt to the dustcap to quieten possible impact noise... et voila!

You have a burst-proof sub.

Don't try this at home children.
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post #17 of 18 Old 09-27-07, 10:36 AM
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Re: Add On Subsonic Filter



seriously though....a high pass filter is about as simple of a circuit as it gets. You could always try and build one yourself. It would cost like 5 dollars for signal level filter components. Speaker level would be a different story. You could even make the cut-off frequency adjustable with a potentiometer.

Last edited by hddummy; 09-27-07 at 10:43 AM.
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post #18 of 18 Old 10-08-07, 11:52 AM
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Re: Add On Subsonic Filter

you could also use one of these

http://www.partsexpress.com/pe/showd...number=266-246
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