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Post by spectralman on Oct 20, 2006 1:11:13 GMT -7
I stumbled across this website last night and have been reading about IB's for the last 3-4 hrs!!! This stuff is great.
I do have an admittedly newbie question, as that is what I am. Just what the heck is a high pass filter and how does it work? I couldn't really find any answers doing a search here.
Thanks.
Bill
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Post by jorgenman on Oct 20, 2006 7:19:18 GMT -7
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Post by ThomasW on Oct 20, 2006 7:36:26 GMT -7
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Post by spectralman on Oct 20, 2006 10:58:18 GMT -7
Thanks for your replies, Jorgenman and Thomas. I never thought to check on Wikipedia; I've used it a bazillion times.
Another question, if I may. Just where would I insert such a filter in the chain of equipment. In my system, I am running from the LFE output of the pro/pro to power amp to passive sub. Will add a BFD in the near future.
Bill
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ryans
Full Member
Posts: 132
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Post by ryans on Oct 20, 2006 13:22:11 GMT -7
If you want to use a HP filter, you'd run the subwoofer/LFE output of the pre-pro to the filter, then from the filter to the amp.
There's really very few reasons to put a HP filter in an IB. The primary reason is that you are concerned that you'll overdrive your woofers at very low frequencies where it takes very little power to reach max excursion. This will vary based on your listening volume levels and how many & what kind of woofers you have.
The secondary reasons would be if you happen to have some bad resonance at very low frequencies or, as in my case, if your amplifier already has a HP filter in it.
HP filters aren't particularly popular here, since the goal is often to get frequency response as low as possible. And many of the members have acquired an excessive amout of woofer displacement, so they don't have to worry about over-driving the woofers.
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Post by spectralman on Oct 20, 2006 20:17:04 GMT -7
Thanks, Ryans. After doing some reading here, I was under the impression that HP filters were a fairly popular item. I guess I was wrong (certainly not the first time). Maybe I got that impression from reading some manufacturers' warnings about overdriving their products when used in IB's.
Bill
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Post by ThomasW on Oct 20, 2006 21:25:52 GMT -7
They should be more popular particularily for those with 'smaller' IB's.
Were they easier to obtain, they're be recommended for all installs. It's cheap insurance for big buck drivers
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Post by jman on Nov 9, 2006 23:07:16 GMT -7
Is there an inherent group delay curve for each highpass slope, 6/12/18db etc per octave?
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