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Old 24th May 2003, 11:02 AM   #1
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Default Subwoofer Crossover

i want to build a Subwoofer Crossover to my Dj Amp...
i want it simple and if can... us in NE5532....
with higher gain !

the Hz it between 70Hz to 15 (or lower...)

thanks for help.
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Old 24th May 2003, 01:21 PM   #2
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Mr Bass Amp,
The lowpass section here s what you're after:
http://www.linkwitzlab.com/filters.htm#3

The use of 1% resistors and caps would be nice but not essential for subwoofer use - you could get away with 5% parts to save money.

Nice one,
David.
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Old 24th May 2003, 03:55 PM   #3
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this is good?
cross
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Old 24th May 2003, 04:24 PM   #4
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That's actually the same circuit, Mr Bass Amp.... Any Sallen & Key type of filter would be fine, be it Butterworth, Chebychev etc but Linkwitz-Riley would probably offer best phase performance (hence my link to Linkwitzlab.com).

I'd advise 24dB/oct (4th order) to prevent any higher frequencies coming from the sub. The quality of components for a sub XO isn't too important IMO and just about any op-amp could handle 100Hz and lower. The NE5532 would be ideal.

Nice one,
David.
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Old 28th May 2003, 03:09 PM   #5
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You can easily build a passive 3rd order crossover for less than a dollar with three resistors and three caps.

1. Put three 470 Ohm resistors in series, this will be the signal path.

2. After the first resistor, put a 3.3uf cap to signal ground.

3. After the second resistor put a 2.2uf cap to signal ground.

4. After the third resistor put a 1uf cap to signal ground.

This will make a 3rd order low-pass crossover @85hz.

For 1st order operation, use the signal at the first cap, for 2nd order use the signal at the second cap and so on. Since this is passive your amp should have decent gain.
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Old 28th December 2005, 03:50 PM   #6
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Quote:
Originally posted by Dj BASS AMP
this is good?
cross

What Language is this?

I want to translate with google !
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Old 28th December 2005, 04:13 PM   #7
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Sounds (and looks) Finnish or some Baltic language !

Regards

Charles
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Old 30th December 2005, 05:46 PM   #8
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Quote:
Originally posted by Solid Snake
You can easily build a passive 3rd order crossover for less than a dollar with three resistors and three caps.

1. Put three 470 Ohm resistors in series, this will be the signal path.

2. After the first resistor, put a 3.3uf cap to signal ground.

3. After the second resistor put a 2.2uf cap to signal ground.

4. After the third resistor put a 1uf cap to signal ground.

This will make a 3rd order low-pass crossover @85hz.

For 1st order operation, use the signal at the first cap, for 2nd order use the signal at the second cap and so on. Since this is passive your amp should have decent gain.


if it works good and satisfactory then its really great.
this network is to b used for line level signal or at the o/p of amp b4 sub?


for designing filters, go to www.download.com
download filterpro, design your own simple and custom filter of any order
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