Hi,
Would it be possible to modify this active crossover circuit with dual ac supply to work with single dc supply?
Linkwitz-Riley Electronic Crossover
24 dB/Octave 2-Way Linkwitz-Riley Electronic Crossover for ICEpower 50ASX2se -
EasyEDA
How to use an opamp with a single supply - YouTube
Would it be possible to modify this active crossover circuit with dual ac supply to work with single dc supply?
Linkwitz-Riley Electronic Crossover
24 dB/Octave 2-Way Linkwitz-Riley Electronic Crossover for ICEpower 50ASX2se -
EasyEDA
How to use an opamp with a single supply - YouTube
Last edited:
It can be done by creating a virtual earth, and using coupling capacitors at the inputs and outputs.
However I would first look into generating the negative rail, for example by using single wave rectification from a transformer for the positive and negative rails if you only have one transformer winding, or adding an extra DC power supply, or by using an isolated DC-DC converter.
However I would first look into generating the negative rail, for example by using single wave rectification from a transformer for the positive and negative rails if you only have one transformer winding, or adding an extra DC power supply, or by using an isolated DC-DC converter.
If you ask because you wish to use a wall wart power supply, note that an ac supply (wall wart) can be rectified to dual dc.
See Power Supply for Preamps
See Power Supply for Preamps
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I am asking, because i want to make "portable" mono 2 way speaker that runs on 20 volt litium power tool batteries.
System: source --》active crossover -- 》class d (separate amp for high&low) -- 》 speaker
Would be nice to keep the system only single dc
System: source --》active crossover -- 》class d (separate amp for high&low) -- 》 speaker
Would be nice to keep the system only single dc
You can use an isolated DC-DC converter as the "power supply" - that's probably easier than trying to modify the design. If all you are powering is four opamps and an LED or two, 100mA per rail is probably enough and so they can be quite small. You'd be able to skip the regulators as well.
PS: Thanks for the link to that 50ASX-filter board - I think I've just found my next project idea 😀
PS: Thanks for the link to that 50ASX-filter board - I think I've just found my next project idea 😀
I was testing the esp Linkwitz Riley 24db/oct calculator a bit for becoming projects:
313Hz C=100nf /0.1uf R=3.6k
341Hz C=100nf/0.1uf R=3.3k
370Hz C=100nf /0.1uf R=3.0k
417hz C=100nf /0.1uf R=2.7k
469Hz C=100nf /0.1uf R=2.4k
511Hz C=100nf /0.1uf R=2.2K
--------------------------------------------------
1500Hz C=10nf/0.01uf R=7.5K
1655Hz C=10nf/0.01uf R=6.8K
1815Hz C=10nf/0.01uf R=6.2K
2011Hz C=10nf/0.01uf R=5.6K
Are these values right or am i missing something?
313Hz C=100nf /0.1uf R=3.6k
341Hz C=100nf/0.1uf R=3.3k
370Hz C=100nf /0.1uf R=3.0k
417hz C=100nf /0.1uf R=2.7k
469Hz C=100nf /0.1uf R=2.4k
511Hz C=100nf /0.1uf R=2.2K
--------------------------------------------------
1500Hz C=10nf/0.01uf R=7.5K
1655Hz C=10nf/0.01uf R=6.8K
1815Hz C=10nf/0.01uf R=6.2K
2011Hz C=10nf/0.01uf R=5.6K
Are these values right or am i missing something?