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high pass/ subsonic filter

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audiomik View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote audiomik Quote  Post ReplyReply Direct Link To This Post Posted: 02 September 2015 at 11:11pm
Well now, a simple passive high-pass filter can be made from a capacitor and a resistor which provides 6dB/Octave roll-off. Series connecting more stages will give steeper roll-off.

To advise further, please can I be informed of the Amplifier input Impedance used
for Bass and the -6dB frequency point you are looking for?

I can then suggest suitable Component values....

Hope this assists

Mik

PS: same type of thing used to good effect as a 'Rumble Filter' in Hi-Fi amplifiers when using Turntables!
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audiomik View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote audiomik Quote  Post ReplyReply Direct Link To This Post Posted: 02 September 2015 at 11:17pm
This Web page might also be of assistance:
http://www.experimentalistsanonymous.com/ve3wwg/doku.php?id=rc_simple_filter

It has a component value calculator as well!

Mik
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shagnasty View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote shagnasty Quote  Post ReplyReply Direct Link To This Post Posted: 02 September 2015 at 11:27pm
For a budget LMS you can't touch a DCX, but the CX3400 is a true 24/LR crossover and with a mod would be pennies, but the DCX would give you a bit of EQ and dymanics as well, for a little party rig I would get, set it and lock the front panel!
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mini-mad View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mini-mad Quote  Post ReplyReply Direct Link To This Post Posted: 02 September 2015 at 11:32pm
Hence the reson i wana sell off my avc2 unit and get a dcx too. Iv got a dbmark version, dbx or something, but want a second LMS for my baby rack... even a cx3400 and have some change for a patch panel.. anyway as said you cant touch a 2nd hand dcx for the money. But if your scraping by for a basic crossover the cx3400 is the one to get.

If it sounds like a gorilla is trying to escape, turn it down.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMorison Quote  Post ReplyReply Direct Link To This Post Posted: 03 September 2015 at 1:24pm
Originally posted by RiddimKid RiddimKid wrote:



I've tried to set a simple 35hz HPF several times but to me it doesn't sound like it's doing anything
 
 
To hear a significant difference (with music at least) your subs would have to have quite a lot of output at those frequencies, in which case you'd probably be ok with a lower HPF - unless you were testing with sine waves in which case the difference would be more obvious.
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