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Old 13th December 2003, 11:58 AM   #1
Optical is offline Optical  New Zealand
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Join Date: Nov 2002
Location: Auckland, New Zealand
Default Crossover or filter

Hi, not too sure about this one..
I would have thought that a filter would be much easier to implement than a crossover for someone building a subwoofer amp...

What are the advantages and disadvantages of each?
i was planning to put an optional 2 pole filter on my gainclone amp to use it solely as a sub amp if need be..
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Old 13th December 2003, 12:13 PM   #2
audioPT is offline audioPT  Portugal
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Join Date: Aug 2002
Location: Right here
For a sub amp, I suggest Active Filter.
With a few (euros) you can make it running.

If you go passive (crossover) you may need to spent more than 100 ...

And if you want a sub, it's that you need really low frequencies, right?
So, something that is up from, say, 80 Hz will be reproduced from your main speakers. All freqs below 80 Hz will come up from the sub. Using a crossover you will need a lot of stuff to stop freqs above 80 Hz...

Make a 2nd order low pass filter. It's enough for you needs!


Pedro Martins
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Old 13th December 2003, 12:27 PM   #3
Optical is offline Optical  New Zealand
diyAudio Member
Join Date: Nov 2002
Location: Auckland, New Zealand
This is pretty much along the lines of what i thought..
So why do people use crossovers?
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Old 16th December 2003, 02:52 AM   #4
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Join Date: Dec 2001
Location: SIUE, Illinois, USA
well, it depedns on what you have available. like if you have 2 channels available. now you'd have to choose between stereo sound, or this active filter. the thing i like about gainclones is that you can get lots of channels for cheap. especially if all you need is a lot of low power channels...
if only it could be used for good, not evil...
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