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Old 16th June 2006, 05:29 PM   #1
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Default SFX Class D subwoofer amplifier modification

I have been sifting thru this forum for a simple Class D amplifierwhen i stumbled upon the fact that this
Class D amplifier has been constructed by SFX for his sub.
what i want is to make it a dual supply version,is it possible?
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Old 16th June 2006, 06:48 PM   #2
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Why not keep it as is ?
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Old 17th June 2006, 04:25 AM   #3
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actually i want to use that amp in my car.i have a smps in the car giving output as + - V. I will be replacing TDA729x amps in the car bec they are big(mostly bec of heatsink).
so i want the amp to be able to hook up directly to the smps without unnecessarily straining it
moreover,isnt a dual supply version better than the single supply one?
can anyone suggest the requisite changes?
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Old 17th June 2006, 05:22 PM   #4
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at least..can anyone check the schematic given at the website and tell wether its correct or not?
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Old 17th June 2006, 07:18 PM   #5
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It's not Buy One Get One Free.

What would you do?

DNA
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Old 17th June 2006, 07:55 PM   #6
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i want to make a class d amp,dual supply one.
this one is too simple and so attracts me.
the other one is complex but promises good quality.
i will finish this one and come to that pretty soon(provided this one is correct)
can anyone check it for errors?
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Old 20th June 2006, 04:12 PM   #7
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isn't there even a single person who can check this scheme for errors??
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Old 20th June 2006, 04:37 PM   #8
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You could check this:

Its my contribution on making the TB a split supply version, but it may not work, the pwm works, thats tested in simulator, but the power part i dunno.
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Old 20th June 2006, 05:10 PM   #9
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hi Tekko,
thank u for your reply.
BTW,is the single supply schematic correct....if i go with that only then is that safe....?
power part....hw can that be corrected(tested) in your version?
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Old 20th June 2006, 05:17 PM   #10
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I have simulated the pulsewith modulator, tho the triangle was more of a sine it seemed to work.

But iŽd still rdcommend you to build the thunderball after the original schem from the author. If you wanna build a split supply amp, try TitanchenŽs circuit.
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