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Old 2nd January 2007, 11:59 PM   #1
qguy is offline qguy  Canada
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Default electronic crossover modification

WARNING ....not an electronics expert.. not even an electronics amateur...

but I just built an electronic subwoofer crossover from a kit, I simply soldered and prayed a lot It has a volume gain pot but it has no cut-off frequency pot, it has a DPDT that switches from 50 or 70 hz. Is the default 50 or 70 hz setting based on the values of the resistors and capacitors ? Does the two IC thats built into the kit play a role in the cut-off frequency. My goal is to change these to 30 and 40 hz, as I can still localize the position of the sub on the 50 hz setting.

I know i need to post the schema, but as i have not taken a photo of the schema as of the moment. If the 50/70 hz cut-off is based on the IC then there is no need to post the schema as this would not be possible to change given my expertise.. thanks
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Old 3rd January 2007, 12:32 AM   #2
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Default Re: electronic crossover modification

Quote:
Originally posted by qguy
Is the default 50 or 70 hz setting based on the values of the resistors and capacitors ?
Most likely, yes.

Quote:
My goal is to change these to 30 and 40 hz, as I can still localize the position of the sub on the 50 hz setting.
That sounds more like a problem with the slope, it may be too gradual and letting too much high frequency through.
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Old 3rd January 2007, 12:40 AM   #3
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Default Re: Re: electronic crossover modification

good so it can be modified

Quote:
Originally posted by pinkmouse


Most likely, yes.



That sounds more like a problem with the slope, it may be too gradual and letting too much high frequency through.

What if I daisy chain two Electronic crossover ? its an 18 db per octave crossover..will this now be an 36 db per octave crossover ?

is this good or bad ?
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Old 3rd January 2007, 12:43 AM   #4
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Hmm, 18dB should be fine. Can you post the schematic please, and pics of the board as well if you have them.
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Old 4th January 2007, 09:47 PM   #5
qguy is offline qguy  Canada
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Hi here is the schematics...

thanks

http://i70.photobucket.com/albums/i1...g?t=1167947408
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Old 5th January 2007, 12:54 AM   #6
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We don't allow crossposting here, so there is a link to the new thread below and I'll close this one.

http://www.diyaudio.com/forums/showt...22#post1098022
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